Difference between revisions of "Team:TU Eindhoven/Notebook"

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                     More information about our achievements outside the lab is shown on the <a class="pagelink" onclick="changeTab('milestones', this)">Milestones</a> page.
 
                     More information about our achievements outside the lab is shown on the <a class="pagelink" onclick="changeTab('milestones', this)">Milestones</a> page.
 
                 </p>
 
                 </p>
 +
 +
<h2>June</h2>
  
 
                 <div class="box middle notebook" data-modal="modal1">
 
                 <div class="box middle notebook" data-modal="modal1">
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                 <div class="box middle notebook" data-modal="modal4">
 
                 <div class="box middle notebook" data-modal="modal4">
                     Thursday June 20, 2019 - Miniprep and protein expression
+
                     Thursday June 20, 2019 - Miniprep & protein expression
 
                 </div>
 
                 </div>
 
                 <div class="modal" id="modal4">
 
                 <div class="modal" id="modal4">
 
                     <div class="modal-content">
 
                     <div class="modal-content">
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday June 20, 2019 - Miniprep and protein expression</h2></div>
+
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday June 20, 2019 - Miniprep & protein expression</h2></div>
 
                         <div class="modal-body">
 
                         <div class="modal-body">
 
                             <p>
 
                             <p>
 
                                 The small cultures were taken out of the incubator. The two cultures with BL21(DE3) cells were put on ice for protein expression later in the morning.
 
                                 The small cultures were taken out of the incubator. The two cultures with BL21(DE3) cells were put on ice for protein expression later in the morning.
 
                                 The plasmids from the other four cultures with NovaBlue cells were isolated using the QIAprep miniprep kit. The following DNA concentrations were obtained:
 
                                 The plasmids from the other four cultures with NovaBlue cells were isolated using the QIAprep miniprep kit. The following DNA concentrations were obtained:
                                 215.8 ng/μL, 225.0 ng/μL, 202.0 ng/μL, 215.2 ng/μL. The samples were put in the freezer (-20oC). Tomorrow these samples will be digested and ligated to form dCas9-Lbit.
+
                                 215.8 ng/μL, 225.0 ng/μL, 202.0 ng/μL, 215.2 ng/μL. The samples were put in the freezer (-20 °C). Tomorrow these samples will be digested and ligated to form dCas9-Lbit.
 
                             </p>
 
                             </p>
 
                             <p>
 
                             <p>
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                                 protein expression was initiated by adding IPTG. The large cultures were incubated overnight.
 
                                 protein expression was initiated by adding IPTG. The large cultures were incubated overnight.
 
                             </p>
 
                             </p>
                            <div class="table-caption">Table 1: DNA concentrations after miniprep</div>
 
                            <table class="parts-table" align="center">
 
                                <tr>
 
                                    <th></th>
 
                                    <th>Concentration (ng/μL)</th>
 
                                </tr>
 
                                <tr>
 
                                    <td>1.</td>
 
                                    <td>215.8</td>
 
                                </tr>
 
                                <tr>
 
                                    <td>2.</td>
 
                                    <td>225.0</td>
 
                                </tr>
 
                                <tr>
 
                                    <td>3.</td>
 
                                    <td>202.0</td>
 
                                </tr>
 
                                <tr>
 
                                    <td>4.</td>
 
                                    <td>215.2</td>
 
                                </tr>
 
                            </table>
 
                            </br>
 
 
                         </div>
 
                         </div>
 
                     </div>
 
                     </div>
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                 <div class="box middle notebook" data-modal="modal5">
 
                 <div class="box middle notebook" data-modal="modal5">
                     Friday June 21, 2019 - Digestion and protein pellets
+
                     Friday June 21, 2019 - Digestion & protein pellets
 
                 </div>
 
                 </div>
 
                 <div class="modal" id="modal5">
 
                 <div class="modal" id="modal5">
 
                     <div class="modal-content">
 
                     <div class="modal-content">
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday June 21, 2019 - Digestion and protein pellets</h2></div>
+
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday June 21, 2019 - Digestion & protein pellets</h2></div>
 
                         <div class="modal-body">
 
                         <div class="modal-body">
 
                             <p>
 
                             <p>
                                 The three large cultures (hopefully with the protein dCas9-Sbit inside the bacteria) were centrifuged in several rounds.
+
                                 The three large cultures were centrifuged in several rounds.
 
                                 The volumes were too big for just one round. After each round, the supernatant was discarded. In the end the pellets were taken out of the centrifuge bottles
 
                                 The volumes were too big for just one round. After each round, the supernatant was discarded. In the end the pellets were taken out of the centrifuge bottles
 
                                 and put into three falcon tubes (pellets from TB, 2YT and LB medium). The pellets were snap freezed and will be purified after the weekend.
 
                                 and put into three falcon tubes (pellets from TB, 2YT and LB medium). The pellets were snap freezed and will be purified after the weekend.
Line 136: Line 114:
 
                                 to separate the digested part from the rest of the plasmid. The ladder had leaked into the samples, however we were still able to cut out the DNA of dCas9-Lbit.
 
                                 to separate the digested part from the rest of the plasmid. The ladder had leaked into the samples, however we were still able to cut out the DNA of dCas9-Lbit.
 
                                 The DNA was retrieved from the agarose gel using the QIAquick Gel Extraction Kit. Due to lack of time, the sample will be ligated after the weekend.
 
                                 The DNA was retrieved from the agarose gel using the QIAquick Gel Extraction Kit. Due to lack of time, the sample will be ligated after the weekend.
                             </p>
+
                             </p>                          
                            <div class="table-caption">Table 2: Nanodrop DNA concentrations after digestion</div>
+
                            <table class="parts-table" align="center">
+
                                <tr>
+
                                    <th></th>
+
                                    <th>Concentration (ng/μL)</th>
+
                                    <th>260/280</th>
+
                                    <th>260/230</th>
+
                                </tr>
+
                                <tr>
+
                                    <td>1.</td>
+
                                    <td>7.5</td>
+
                                    <td>1.53</td>
+
                                    <td>0.31</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>2.</td>
+
                                    <td>9.3</td>
+
                                    <td>1.76</td>
+
                                    <td>0.44</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>3.</td>
+
                                    <td>13.7</td>
+
                                    <td>1.73</td>
+
                                    <td>0.91</td>
+
                                </tr>
+
                            </table>
+
                            </br>
+
 
                         </div>
 
                         </div>
 
                     </div>
 
                     </div>
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                 <div class="box middle notebook" data-modal="modal6">
 
                 <div class="box middle notebook" data-modal="modal6">
                     Monday June 24, 2019 - Ligation and column preparation
+
                     Monday June 24, 2019 - Ligation & column preparation
 
                 </div>
 
                 </div>
 
                 <div class="modal" id="modal6">
 
                 <div class="modal" id="modal6">
 
                     <div class="modal-content">
 
                     <div class="modal-content">
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday June 24, 2019 - Ligation and column preparation</h2></div>
+
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday June 24, 2019 - Ligation & column preparation</h2></div>
 
                         <div class="modal-body">
 
                         <div class="modal-body">
 
                             <p>
 
                             <p>
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                             </p>
 
                             </p>
  
                            <div class="table-caption">Table 3: Ligation mixtures (calculated based on DNA concentration</div>
 
                            <table class="parts-table" align="center">
 
                                <tr>
 
                                    <th></th>
 
                                    <th>50 ng vector (μL)</th>
 
                                    <th>MilliQ (μL)</th>
 
                                </tr>
 
                                <tr>
 
                                    <td>1.</td>
 
                                    <td>6.67</td>
 
                                    <td>10.33</td>
 
                                </tr>
 
                                <tr>
 
                                    <td>2.</td>
 
                                    <td>5.4</td>
 
                                    <td>11.6</td>
 
                                </tr>
 
                                <tr>
 
                                    <td>3.</td>
 
                                    <td>3.65</td>
 
                                    <td>13.35</td>
 
                                </tr>
 
                            </table>
 
                            </br>
 
 
                         </div>
 
                         </div>
 
                     </div>
 
                     </div>
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                 <div class="box middle notebook" data-modal="modal7">
 
                 <div class="box middle notebook" data-modal="modal7">
                     Tuesday June 25, 2019 - Purification and small culture
+
                     Tuesday June 25, 2019 - Purification & small culture
 
                 </div>
 
                 </div>
 
                 <div class="modal" id="modal7">
 
                 <div class="modal" id="modal7">
 
                     <div class="modal-content">
 
                     <div class="modal-content">
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday June 25, 2019 - Purification and small culture</h2></div>
+
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday June 25, 2019 - Purification & small culture</h2></div>
 
                         <div class="modal-body">
 
                         <div class="modal-body">
 
                             <p>
 
                             <p>
                                 The pellets of dCas9-Sbit were taken out of the -80oC freezer and put on ice to thaw. Subsequently, the pellets were dissolved and lysed (chemically).
+
                                 The pellets of dCas9-Sbit were taken out of the -80 °C freezer and put on ice to thaw. Subsequently, the pellets were dissolved and lysed (chemically).
 
                                 When the lysing was finished, the proteins were purified using <mark class="yellow">IMAC columns</mark>. The elution from the IMAC columns were then put on the <mark class="green">strep columns</mark>.
 
                                 When the lysing was finished, the proteins were purified using <mark class="yellow">IMAC columns</mark>. The elution from the IMAC columns were then put on the <mark class="green">strep columns</mark>.
 
                                 Amicon filters were used to concentrate the elution from the strep columns. NanoDrop was used to measure if there were any proteins in the solution.
 
                                 Amicon filters were used to concentrate the elution from the strep columns. NanoDrop was used to measure if there were any proteins in the solution.
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                 <div class="box middle notebook" data-modal="modal8">
 
                 <div class="box middle notebook" data-modal="modal8">
                     Wednesday June 26, 2019 - Miniprep and SDS-PAGE
+
                     Wednesday June 26, 2019 - Miniprep & SDS-PAGE
 
                 </div>
 
                 </div>
 
                 <div class="modal" id="modal8">
 
                 <div class="modal" id="modal8">
 
                     <div class="modal-content">
 
                     <div class="modal-content">
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday June 26, 2019 - Miniprep and SDS-PAGE</h2></div>
+
                         <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday June 26, 2019 - Miniprep & SDS-PAGE</h2></div>
 
                         <div class="modal-body">
 
                         <div class="modal-body">
 
                             <p>
 
                             <p>
Line 251: Line 177:
 
                                 After this, the gel is washed in water overnight on the shaking table.
 
                                 After this, the gel is washed in water overnight on the shaking table.
 
                             </p>
 
                             </p>
                             <div class="table-caption">Table 4: DNA concentrations dCas9-Lbit</div>
+
                              
                            <table class="parts-table" align="center">
+
                                <tr>
+
                                    <th></th>
+
                                    <th>Concentration (ng/μL)</th>
+
                                    <th>260/280</th>
+
                                    <th>260/230</th>
+
                                </tr>
+
                                <tr>
+
                                    <td>1.</td>
+
                                    <td>44</td>
+
                                    <td>1.79</td>
+
                                    <td>1.82</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>2.</td>
+
                                    <td>180</td>
+
                                    <td>1.84</td>
+
                                    <td>1.97</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>3.</td>
+
                                    <td>204.1</td>
+
                                    <td>1.87</td>
+
                                    <td>2.22</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>4.</td>
+
                                    <td>194.4</td>
+
                                    <td>1.87</td>
+
                                    <td>2.13</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>5.</td>
+
                                    <td>198.9</td>
+
                                    <td>1.86</td>
+
                                    <td>2.21</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>6.</td>
+
                                    <td>209.5</td>
+
                                    <td>1.89</td>
+
                                    <td>2.28</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>7.</td>
+
                                    <td>211.4</td>
+
                                    <td>1.86</td>
+
                                    <td>2.19</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>8.</td>
+
                                    <td>190.5</td>
+
                                    <td>1.87</td>
+
                                    <td>2.18</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>9.</td>
+
                                    <td>223.8</td>
+
                                    <td>1.86</td>
+
                                    <td>2.14</td>
+
                                </tr>
+
                                <tr>
+
                                    <td>10.</td>
+
                                    <td>209.9</td>
+
                                    <td>1.85</td>
+
                                    <td>2.19</td>
+
                                </tr>
+
                            </table>
+
                            </br>
+
 
                         </div>
 
                         </div>
 
                     </div>
 
                     </div>
Line 327: Line 184:
  
 
             <div class="box middle notebook" data-modal="modal9">
 
             <div class="box middle notebook" data-modal="modal9">
                 Thursday June 27, 2019 - SDS-PAGE + sequencing + new LB stock
+
                 Thursday June 27, 2019 - SDS-PAGE, sequencing & new LB stock
 
             </div>
 
             </div>
 
             <div class="modal" id="modal9">
 
             <div class="modal" id="modal9">
 
                 <div class="modal-content">
 
                 <div class="modal-content">
                     <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday June 27, 2019 - SDS-PAGE + sequencing + new LB stock</h2></div>
+
                     <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday June 27, 2019 - SDS-PAGE, sequencing & new LB stock</h2></div>
 
                     <div class="modal-body">
 
                     <div class="modal-body">
 
                         <div class="photo-center">
 
                         <div class="photo-center">
 
                             <img src="https://2019.igem.org/wiki/images/4/49/T--TU_Eindhoven--Lab20190627.png" alt="Process" width="90%" />
 
                             <img src="https://2019.igem.org/wiki/images/4/49/T--TU_Eindhoven--Lab20190627.png" alt="Process" width="90%" />
                             </br>Fig. 1: SDS-PAGE gels.
+
                             </br>Fig. 2: SDS-PAGE gels.
 
                         </div>
 
                         </div>
 
                     </div>
 
                     </div>
Line 343: Line 200:
  
 
             <div class="box middle notebook" data-modal="modal10">
 
             <div class="box middle notebook" data-modal="modal10">
                 Friday June 28, 2019 - 2nd Transformation Sbit + IPTG stock
+
                 Friday June 28, 2019 - 2<sup>nd</sup> Transformation Sbit, IPTG stock & New plan expression
 
             </div>
 
             </div>
 
             <div class="modal" id="modal10">
 
             <div class="modal" id="modal10">
 
                 <div class="modal-content">
 
                 <div class="modal-content">
                     <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday June 28, 2019 - 2nd Transformation Sbit + IPTG stock</h2></div>
+
                     <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday June 28, 2019 - 2<sup>nd</sup> Transformation Sbit, IPTG stock & New plan expression</h2></div>
 
                     <div class="modal-body">
 
                     <div class="modal-body">
 
                         <p>
 
                         <p>
Line 364: Line 221:
 
                             Hence, for 1mM final concentration, add <b>1.2 ml stock IPTG to 1L medium</b>. For 200nM final concentration, add <b>0.25 ml stock IPTG</b>.
 
                             Hence, for 1mM final concentration, add <b>1.2 ml stock IPTG to 1L medium</b>. For 200nM final concentration, add <b>0.25 ml stock IPTG</b>.
 
                         </p>
 
                         </p>
 
+
<h3>New plan Expression</h3>
                    </div>
+
<p>
                </div>
+
            </div>
+
 
+
 
+
            <div class="box middle notebook" data-modal="modal11">
+
                Friday June 28, 2019 - New plan expression
+
            </div>
+
            <div class="modal" id="modal11">
+
                <div class="modal-content">
+
                    <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday June 28, 2019 - New plan expression</h2></div>
+
                    <div class="modal-body">
+
                        <p>
+
 
                             From the SDS-PAGE results we concluded that no dCas9-Sbit was formed. Therefore a new plan was made to test different combinations of expression conditions based on
 
                             From the SDS-PAGE results we concluded that no dCas9-Sbit was formed. Therefore a new plan was made to test different combinations of expression conditions based on
 
                             information we gathered. The plan is to test four different condition combinations.
 
                             information we gathered. The plan is to test four different condition combinations.
Line 390: Line 235:
 
                             </ul>
 
                             </ul>
 
                         </p>
 
                         </p>
                        <div class="table-caption">Table 5: Further conidition combinations</div>
 
                        <table class="parts-table" align="center">
 
                            <tr>
 
                                <th></th>
 
                                <th>IPTG (mM)</th>
 
                                <th>Temperature (°C)</th>
 
                            </tr>
 
                            <tr>
 
                                <td>1.</td>
 
                                <td>0.2</td>
 
                                <td>16</td>
 
                            </tr>
 
                            <tr>
 
                                <td>2.</td>
 
                                <td>1.0</td>
 
                                <td>16</td>
 
                            </tr>
 
                            <tr>
 
                                <td>3.</td>
 
                                <td>0.2</td>
 
                                <td>20</td>
 
                            </tr>
 
                            <tr>
 
                                <td>4.</td>
 
                                <td>1.0</td>
 
                                <td>20</td>
 
                            </tr>
 
                        </table>
 
                        </br>
 
 
                     </div>
 
                     </div>
 
                 </div>
 
                 </div>
 
             </div>
 
             </div>
 +
 +
           
 +
<h2>August</h2>
 +
 +
<div class="box middle notebook" data-modal="modal100">
 +
                    Tuesday August 13, 2019 - Reorganization
 +
            </div>
 +
                <div class="modal" id="modal100">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday August 13, 2019 - Reorganization</h2></div>
 +
                        <div class="modal-body">
 +
                            <p>We reorganized the blue boxes containing all DNA, enzymes and reagents in the -20 °C freezer.</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
 +
 +
<div class="box middle notebook" data-modal="modal101">
 +
                    Wednesday August 14, 2019 - Digestion, PCR amplification
 +
                </div>
 +
                <div class="modal" id="modal101">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday August 14, 2019 - Digestion, PCR amplification</h2></div>
 +
                        <div class="modal-body">
 +
                            <h3>Split-NL</h3>
 +
<p>
 +
The expressed Liu Addgene construct was purified using IMAC. Afterwards, SDS-PAGE analysis was performed to check whether the correct protein
 +
was retrieved. A band around 170 kDa was expected and the SDS-PAGE gel indeed shows a band just above 150 kDa.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Parts 2 and 3 were PCR amplified to retrieve enough DNA for digestion and ligation. Subsequently, both parts were digested using the restriction
 +
site NheI. The digested parts were separated using an agarose gel and excised.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal102">
 +
                    Thursday August 15, 2019 - Meeting with supervisors
 +
            </div>
 +
                <div class="modal" id="modal102">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday August 15, 2019 - Meeting with supervisors</h2></div>
 +
                        <div class="modal-body">
 +
                            <h3>General</h3>
 +
<p>
 +
Today we had a meeting with our supervisors. We presented our progress and discussed about some problems we encountered in the lab.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
We performed gel extraction of BRET part 2 and BRET part 3 after NheI digestion. The DNA concentrations were measured using NanoDrop.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal103">
 +
                    Friday August 16, 2019 - Gibson Assembly primers design
 +
            </div>
 +
                <div class="modal" id="modal103">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday August 16, 2019 - Gibson Assembly primers design</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
                            <p>
 +
For BRET it was decided that Gibson Assembly would be performed instead of regular digestion and ligation. The gBlocks we ordered cannot directly be used for Gibson,
 +
since the gBlocks do not contain overlap. We designed overhang primers for the gBlocks to make them suitable for Gibson assembly and ordered them from IDT.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal104">
 +
                    Monday August 19, 2019 - Transformation & ligation
 +
            </div>
 +
                <div class="modal" id="modal104">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday August 19, 2019 - Transformation & ligation</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
                            <p>
 +
After successful ligation of the Liu Addgene dCas9 sequence into our original vector, the plasmid was transformed into BL21 cells. We used four plates:
 +
2 for Sbit and 2 for Lbit. They were incubated overnight at 37 °C.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
After successful NheI digestion, BRET parts 2 and 3 were ligated to each other. This was done to be able to perform a 1:1 ligation instead of a 2:1 ligation.
 +
However, the agarose gel made after ligation did not show any successful results.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal105">
 +
                    Tuesday August 20, 2019 - Small culture & digestion
 +
            </div>
 +
                <div class="modal" id="modal105">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday August 20, 2019 - Small culture & digestion</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
                            <p>
 +
Transformation was successful, so small cultures were made using kanamycin and LB medium. From each plate 1 colony was taken, so 2 small cultures containing Sbit
 +
and 2 small cultures containing Lbit. In addition, a positive control was made containing just a pipette tip without tipping a colony.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Since ligation of part 2 and 3 was not successful, digestion was performed again to prepare the parts for 2:1 ligation (part 2 and 3 separately into the
 +
digested vector). Part 2 was restricted with SacI & NheI restriction enzymes and part 3 was restricted with NheI & XhoI restriction enzymes. In addition,
 +
the vector was digested using the SacI & XhoI restriction enzymes. The digested samples were then ran on an agarose gel and cut out.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal106">
 +
                    Wednesay August 21, 2019 - Large culture, ligation & digestion
 +
            </div>
 +
                <div class="modal" id="modal106">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesay August 21, 2019 - Large culture, ligation & digestion</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
                            <p>
 +
2 L large cultures were made from 1 Sbit and 1 Lbit small culture. The bacteria were grown at 37 °C and 160 rpm until OD600 = 0.6-0.7. At OD600 = 0.6, protein
 +
expression was initiated by adding IPTG. The cultures were then grown overnight at 18 °C and 160 rpm.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Gel extraction was performed for the digested part 2 and 3 and the digested vector. A 2:1 ligation was performed to ligate digested parts 2 and 3 into the digested
 +
vector. The ligation product was transformed into NovaBlue cells.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal107">
 +
                    Thursday August 22, 2019 - Purification, PCR
 +
            </div>
 +
                <div class="modal" id="modal107">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday August 22, 2019 - Purification, PCR</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
                            <p>
 +
The large cultures were centrifuged and the pellets containing bacteria were lysed using ultrasound. After this the samples were centrifuged again to spin
 +
down the lysed bacteria. The lysate was purified with a strep column. The elution was captured in 1.5 ml fractions and protein concentrations were measured
 +
with NanoDrop.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Transformation was successful. 14 colonies were selected for colony PCR and this was put on an agarose gel. Colonies 1, 2, 3, 4, 7, 8, 9, 10,
 +
11, 12 & 14 seem to be successful. 14 small cultures were made with all selected colonies. In addition, parts 1 and 2 were PCR amplified using
 +
overhang PCR and the designed primers to prepare them for Gibson Assembly.
 +
</p>
 +
<h3>Peking Split Luciferase</h3>
 +
<p>
 +
The inserts which were ordered at Twist Biosience were multiplied with PCR, because we will need 1 μg for digestion. These inserts will be ligated
 +
in our own vector after dCas9. The sequence for our linker, NanoLuc small bit and NanoLuc large bit will be cut out.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal108">
 +
                    Friday August 23, 2019 - SDS & Bioluminescence test
 +
            </div>
 +
                <div class="modal" id="modal108">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday August 23, 2019 - SDS & Bioluminescence test </h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
To determine the purity of the samples that were purified a SDS page gel was made. Furthermore, Lbit of NanoLuc is slightly bioluminescent
 +
itself. This was tested with the plate reader.
 +
                            </p>
 +
<h3>BRET</h3>
 +
<p>
 +
The small cultures were miniprepped and the DNA concentrations were measured using NanoDrop.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal109">
 +
                    Monday August 26, 2019 - Transformation 
 +
            </div>
 +
                <div class="modal" id="modal109">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday August 26, 2019 - Transformation</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We ordered three gBlocks containing target DNA at IDT for testing. We PCR amplified these gBlocks to use them for all bioluminescence tests.
 +
After PCR amplification and PCR purification, we measured the DNA concentrations using NanoDrop.
 +
                            </p>
 +
<h3>BRET</h3>
 +
<p>
 +
The successfully ligated DNA for our BRET sensor was transformed into BL21 cells and plated out. The plates were incubated overnight at 37 °C.
 +
In addition, LB medium for large cultures was prepared for expression later this week.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal110">
 +
                    Tuesday August 27, 2019 - Sequencing & purification 
 +
            </div>
 +
                <div class="modal" id="modal110">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday August 27, 2019 - Sequencing & purification</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
The second batch of dCa9s-Lbit and dCas9-Sbit were purified with strap tag columns. The concentrations were measured using NanoDrop.
 +
Transformation into NovaBlue was done, because there was not enough DNA for sequencing samples.
 +
                            </p>
 +
<h3>BRET</h3>
 +
<p>
 +
Sequencing samples were made to confirm the ligation was successful. The samples were sent to BaseClear for sequencing. Furthermore,
 +
colonies were picked and small cultures were made.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal111">
 +
                    Wednesday August 28, 2019 - Small cultures & SDS gel   
 +
            </div>
 +
                <div class="modal" id="modal111">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday August 28, 2019 - Small cultures & SDS gel</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
A SDS gel was made to confirm the purification of yesterday. Furthermore, NB small cultures were made which will be miniprepped tomorrow.
 +
As you can see, a big blob can be seen for the elution fractions. A band would be expected at 179 kDa for Lbit and at 163 kDa for Sbit.
 +
                            </p>
 +
<h3>BRET</h3>
 +
<p>
 +
The large culture media turned out to be infected. New culture media and new small cultures were made.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal112">
 +
                    Thursday August 29, 2019 - Expression & Q-Tof sample   
 +
            </div>
 +
                <div class="modal" id="modal112">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday August 29, 2019 - Expression & Q-Tof sample</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
A Q-Tof sample was made for Split NL. However, our proteins are too big for Q-Tof, so no results were retrieved.
 +
In addition, miniprepping of the small cultures was done to retrieve more DNA for sequencing. The DNA concentrations were measured using NanoDrop.
 +
                            </p>
 +
<h3>BRET</h3>
 +
<p>
 +
The small cultures were added to the large cultures (1.5L) after adding kanamycin. Expression was initiated at an OD of approximately 0.6 with 200 μL/L IPTG.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal113">
 +
                    Friday August 30, 2019 - Purification   
 +
            </div>
 +
                <div class="modal" id="modal113">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday August 30, 2019 - Purification</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
The large cultures were spinned down in 2 bottles per culture and lysed using sonication. Per large culture 1 bottle was purified and the other lysed sample was
 +
stored at -80 °C. His and Strep purification was performed. After His purification, no protein was present in the eluted samples.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<h2>September</h2>
 +
 +
<div class="box middle notebook" data-modal="modal114">
 +
                    Monday September 2, 2019 - Testing   
 +
            </div>
 +
                <div class="modal" id="modal114">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday September 2, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
Started the first tests with the dCas9-Split-NanoLuc sensor. We tested with 50 μL samples in a 384-well plate:
 +
<ol class="list">
 +
<li>Only PBS + 0.1% BSA</li>
 +
<li>10 nM SmallBit</li>
 +
<li>10 nM LargeBit</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + 1.2nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 1.2 nM unspecific DNA</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 1.2 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 2 + 1.2 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 3 + 1.2 nM DNA 2</li>
 +
</ol>
 +
NanoGlo in 1000x dilution was added to each sample before testing.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Last Friday, no protein was present after His purification. Since we circularly permutated the dCas9 protein, it would be possible that the His tag
 +
is not available. Therefore, we decided to only perform Strep purification using the His flow-through from last time. We measured the concentrations
 +
using NanoDrop.
 +
</p>
 +
<h3>Peking</h3>
 +
<p>
 +
To be able to compare our new sensor with the sensor from Peking 2015, we decided to produce the Peking sensor containing Firefly luciferase instead
 +
of Split NanoLuc. We ordered the sequences of the split firefly luciferases with their linker and will put these insert behind our own dCas9. First
 +
digestion was performed with the original vector, Cluc insert, Nluc insert. PCR purification was done and the concentrations were measured using NanoDrop.
 +
The samples were put on an agarose gel and the correct bands were cut out.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal115">
 +
                    Tuesday September 3, 2019 - Testing   
 +
            </div>
 +
                <div class="modal" id="modal115">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 3, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We did more testing in triplo with 50 μL samples in a 384-well plate:
 +
<ol class="list">
 +
<li>Only PBS + 0.1% BSA</li>
 +
<li>10 nM SmallBit</li>
 +
<li>10 nM LargeBit</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + 1.2nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 1.2 nM unspecific DNA</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 0.6 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 1.2 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 1 + 2.4 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 2 + 0.6 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 2 + 1.2 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 2 + 2.4 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 3 + 0.6 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 3 + 1.2 nM DNA 2</li>
 +
<li>10 nM SmallBit + 10 nM LargeBit + sgRNA 3 + 2.4 nM DNA 2</li>
 +
</ol>
 +
NanoGlo in 2000x dilution was added to each sample before testing.
 +
</p>
 +
<p>
 +
In the afternoon, we tested with lower sensor concentrations in duplo:
 +
<ol class="list">
 +
<li>Only PBS + 0.1% BSA</li>
 +
<li>1 nM SmallBit + 1 nM LargeBit</li>
 +
<li>0.5 nM SmallBit + 0.5 nM LargeBit</li>
 +
<li>1 nM SmallBit + 1 nM LargeBit + 1.2 nM DNA 2</li>
 +
<li>0.5 nM SmallBit + 0.5 nM LargeBit + 1.2 nM DNA 2</li>
 +
<li>1 nM SmallBit + 1 nM LargeBit + sgRNA 2 + 1.2 nM unspecific DNA</li>
 +
<li>0.5 nM SmallBit + 0.5 nM LargeBit + sgRNA 2 + 1.2 nM unspecific DNA</li>
 +
<li>1 nM SmallBit + 1 nM LargeBit + sgRNA 2 + 1.2nM DNA 2</li>
 +
<li>0.5 nM SmallBit + 0.5 nM LargeBit + sgRNA 2 + 1.2nM DNA 2</li>
 +
</ol>
 +
NanoGlo in 2000x dilution was added to each sample before testing.
 +
</p>
 +
When analyzing the results, the control samples 4 and 5 in test 1 and control samples 3, 4 and 5 in test 2 gave a very high signal. The signal was much higher
 +
than the samples containing sgRNA and target DNA. Therefore, we put samples on the SDS gel. However, we used a relatively high concentration of BSA in the buffer,
 +
which can clearly be seen on gel due to a band at the height of 50 kDa. Some smears can be observed around 300 kDa, indicating aggregation, but it cannot be seen
 +
clearly due to the presence of BSA.
 +
<h3>Peking</h3>
 +
<p>
 +
The DNA from the piece of gel which was cut out yesterday was extracted. Nluc and Cluc were each separately ligated into the vector containing dCas9. After ligation,
 +
the DNA was transformed into NovaBlue.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal116">
 +
                    Wednesay September 4, 2019 - Colony PCR 
 +
            </div>
 +
                <div class="modal" id="modal116">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesay September 4, 2019 - Colony PCR  </h2></div>
 +
                        <div class="modal-body">
 +
<h3>Peking</h3>
 +
<p>
 +
Ligation was successful since colonies were present. Colony PCR was performed, but the results did not show anything. The positive result had failed as well, so we
 +
cannot use it. Random colonies were selected and small cultures were made.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal117">
 +
                    Tuesday September 5, 2019 - Testing 
 +
            </div>
 +
                <div class="modal" id="modal117">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 5, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We read that dCas9 shows aggregation when incubated at 37 °C, and that this can be prevented by incubation at room temperature for at least 10 minutes.
 +
Therefore, we tested the sensor activity under different incubation conditions. Tests in duplo:
 +
<ol class="list">
 +
<li>10 nM Sbit + 10 nM Lbit | <i>incubated for 10 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM target DNA | <i>incubated for 10 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + unspecific DNA | <i>incubated for 10 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + 1.2 nM target DNA | <i>incubated for 10 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit | <i>incubated for 30 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM target DNA | <i>incubated for 30 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + unspecific DNA | <i>incubated for 30 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + 1.2 nM target DNA | <i>incubated for 30 minutes at room temperature</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit | <i>incubated for 30 minutes at 37 °C</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM target DNA | <i>incubated for 30 minutes at 37 °C</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + unspecific DNA | <i>incubated for 30 minutes at 37 °C</i></li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA + 1.2 nM target DNA | <i>incubated for 30 minutes at 37 °C</i></li>
 +
</ol>
 +
NanoGlo in 2000x dilution was added to each sample.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
The sequencing for the BRET sensor showed a completely wrong sequence for all samples. However, when we further analyzed the sequence it completely
 +
aligns with the sequence for our Split-NL sensor. When our original vector was digested using the correct restriction enzymes, the bands on the gel
 +
were difficult to distinguish from each other. Probably both our original insert (of the Split-NL sensor) and the vector were present in the sliced gel.
 +
Therefore, the original insert was ligated into the vector. We tested both sample 10 and 11 for luminescence and BRET sample 10 showed a big peak,
 +
indicating the presence of LargeBit. BRET sample 11 did not show any luminescence.
 +
</p>
 +
<h3>Peking</h3>
 +
<p>
 +
Small cultures were miniprepped and transformed into BL21(DE3).
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal118">
 +
                    Monday September 9, 2019 - Small culture & Gibson   
 +
            </div>
 +
                <div class="modal" id="modal118">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday September 9, 2019 - Small culture & Gibson </h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
Since BRET parts 10 and 11 did not show the correct sequence for sequencing, we decided to check the sequence for other colonies. We decided to check the
 +
sequence for colonies 3 and 8. Small cultures in NovaBlue were made for these colonies.
 +
</p>
 +
<p>
 +
Furthermore Gibson Assembly was performed to ligate the three G-blocks. The mixture was transformed into XL10-Gold cells and plated. The samples of the
 +
Gibson reaction were put on an agarose gel.
 +
</p>
 +
<h3>Peking</h3>
 +
<p>
 +
Small cultures were made. Furthermore, large culture medium, LB medium and LB agar medium were prepared and autoclaved.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal119">
 +
                    Tuesday September 10, 2019 - Sequencing samples & testing   
 +
            </div>
 +
                <div class="modal" id="modal119">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 10, 2019 - Sequencing samples & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<h4>Sequencing</h4>
 +
<p>
 +
Sequencing samples were made and sent to BaseClear:
 +
<ul class="list">
 +
<li>Sample 1: Sbit 6 + dCas9-G247-FOR</li>
 +
<li>Sample 2: Sbit 6 + dCas9-G485-FOR</li>
 +
<li>Sample 3: Sbit 6 + dCas9-G717-FOR</li>
 +
<li>Sample 4: Sbit 6 + dCas9-A932-FOR</li>
 +
<li>Sample 5: Sbit 6 + dCas9-T1167-FOR</li>
 +
<li>Sample 6: Lbit 13 + dCas9-G247-FOR</li>
 +
<li>Sample 7: Lbit 13 + dCas9-G485-FOR</li>
 +
<li>Sample 8: Lbit 13 + dCas9-G717-FOR</li>
 +
<li>Sample 9: Lbit 13 + dCas9-A932-FOR</li>
 +
<li>Sample 10: Lbit 13 + dCas9-T1167-FOR</li>
 +
</ul>
 +
</p>
 +
<h4>testing</h4>
 +
<p>
 +
A test was performed where the interspace distance was varied. Incubation was done for 30 minutes at room temperature. Order of addition
 +
in the plate: (1) DNA (2) Sbit (3) Lbit. NanoGlo was added in a 2000x dilution. Samples tested:
 +
<ol class="list">
 +
<li>10 nM Sbit + 10 nM Lbit </li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM DNA 2 </li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM non-target DNA </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 1 + 1.2 nM DNA 1 (interspace distance 10) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 2 + 1.2 nM DNA 1 (interspace distance 12) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 3 + 1.2 nM DNA 1 (interspace distance 15) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 1 + 1.2 nMDNA 2 (interspace distance 17) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 2 + 1.2 nMDNA 2 (interspace distance 20) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 3 + 1.2 nM DNA 2 (interspace distance 22) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 1 + 1.2 nM DNA 3 (interspace distance 25) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 2 + 1.2 nM DNA 3 (interspace distance 27) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + sgRNA 3 + 1.2 nM DNA 3 (interspace distance 30) </li>
 +
</ol>
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Miniprepping of BRET no.3 & BRET no.8 (small cultures) was done. These are 2 colonies with the correct vector length during colony PCR.
 +
Afterwards, sequencing samples were made of these BRET samples and sent to BaseClear:
 +
<ul class="list">
 +
<li>Sample 11: BRET 10 + T7.FOR </li>
 +
<li>Sample 12: BRET 10 + dCas9-S1338-FOR</li>
 +
<li>Sample 13: BRET 10 + dCas9-G247-FOR</li>
 +
<li>Sample 14: BRET 10 + dCas9-G485-FOR</li>
 +
<li>Sample 15: BRET 10 + dCas9-G717-FOR</li>
 +
<li>Sample 16: BRET 10 + dCas9-A932-FOR </li>
 +
<li>Sample 17: BRET 3 + T7.FOR</li>
 +
<li>Sample 18: BRET 8 + T7.FOR</li>
 +
</ul>
 +
No colonies were present after transformation, so Gibson Assembly failed. When looking at the gel, this is not suprising.
 +
</p>
 +
<h3>Peking</h3>
 +
<p>
 +
The small cultures were added to the large cultures. At the end of the day the cultures were induced with IPTG to activate protein expression.
 +
Furthermore, new LB agar plates were made.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal120">
 +
                    Wednesay September 11, 2019 - Overhang PCR   
 +
            </div>
 +
                <div class="modal" id="modal120">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesay September 11, 2019 - Overhang PCR</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
The overhang PCR of G-block 3 had failed before. This was done again (G3Bv2) because the overhangs are needed to perform Gibson Assembly of
 +
G-block 2 and 3 into the backbone (SacI-AgeI). After PCR amplification and purification, Gibson Assembly was performed. The samples for Gibson
 +
were also put on an agarose gel to check whether PCR was successful.
 +
</p>
 +
<p>
 +
G-block 2 and 3 were also digested for regular ligation. However, this had failed due to too low concentrations.
 +
</p>
 +
<h3>Peking</h3>
 +
<p>
 +
Due to many changes in our original vector we discovered that there were no tags in the Peking construct for purification. The His tag was
 +
lost when the original dCas9 was replaced by the dCas9 from Addgene, due to the restriction sites. Therefore the large cultures were thrown
 +
away and we decided not to use these samples anymore.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal121">
 +
                    Tuesday September 12, 2019 - Testing & Transformation   
 +
            </div>
 +
                <div class="modal" id="modal121">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 12, 2019 - Testing & Transformation</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
A test was performed where the samples were incubated for 30 minutes at room temperature. Afterwards, the samples were centrifuged at 13,400 rpm for 5 minutes
 +
to get rid of aggregates. The supernatant was used for testing. NanoGlo was added in 2000x dilution and samples of 30 μL were tested. Samples:
 +
<ol class="list">
 +
<li>10 nM Sbit + 10 nM Lbit</li>
 +
<li>10 nM Sbit + 10 nM Lbit + 1.2 nM DNA 1</li>
 +
<li>10 nM Sbit + 10 nM Lbit + gRNA 3 + 1.2 nM non-target DNA </li>
 +
<li>10 nM Sbit + 10 nM Lbit + gRNA 1 + 1.2 nM DNA 1 (interspace distance 10) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + gRNA 2 + 1.2 nM DNA 1 (interspace distance 12) </li>
 +
<li>10 nM Sbit + 10 nM Lbit + gRNA 3 + 1.2 nM DNA 1 (interspace distance 15)</li>
 +
</ol>
 +
In addition, a test was performed where the gRNA was added in a 6x excess (final concentration of 13 nM). This was based on 2 papers. The samples were incubated
 +
for 30 minutes at room temperature. NanoGlo was added in 2000x dilution and samples of 30 μL were tested. Samples:
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit </li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM DNA 1 </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 3 + 1.2 nM non-target DNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 1 + 1.2 nM DNA 1 (interspace distance 10) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 2 + 1.2 nM DNA 1 (interspace distance 12) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 3 + 1.2 nM DNA 1 (interspace distance 15) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 1 + 1.2 nM DNA 2 (interspace distance 17) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 2 + 1.2 nM DNA 2 (interspace distance 20) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 3 + 1.2 nM DNA 2 (interspace distance 22) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 1 + 1.2 nM DNA 3 (interspace distance 25) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 2 + 1.2 nM DNA 3 (interspace distance 27) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 3 + 1.2 nM DNA 3 (interspace distance 30)</li>
 +
</ol>
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
The Gibson Assembly mixture was transformed into XL10-Gold competent cells.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal122">
 +
                    Monday September 16, 2019 - Ligation & transformation   
 +
            </div>
 +
                <div class="modal" id="modal122">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday September 16, 2019 - Ligation & transformation</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
Transformation of the Gibson Assembly mixture had failed, since no colonies were present. We decided to do a 1 insert ligation with part 2 into the backbone.
 +
In addition, a 2 insert ligation with both parts 2 and 3 was also performed.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal123">
 +
                  Tuesday September 17, 2019 - Ligation & transformation   
 +
            </div>
 +
                <div class="modal" id="modal123">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 17, 2019 - Ligation & transformation</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
Yesterday's 1 insert and 2 insert ligations of gBlocks BRETp2 and BRETp2 + BRETp3 respectively failed. The agar plates were devoid of colonies,
 +
whereas the positive control plate was not. Therefore, the ligations were repeated with alternative molar ratios (4:1 and 5:5:1 respectively,
 +
insert:(insert:)vector), starting from the same restriction digested building blocks.
 +
</p>
 +
<p>
 +
Moreover, restriction digestions were performed to form a new set of digested gBlocks, which were subsequently purified by agarose gel.
 +
</p>
 +
<h3>Characterization</h3>
 +
<p>
 +
For a Bronze medal we need to make a contribution in the form of a characterization to an existing part in the Registry. iGEM Eindhoven
 +
2016 created a CT52-mNeonGreen part they did not express due to lack of time. They expressed CT52-Sbit and CT52-Lbit, so therefore it
 +
would be plausible that expression of this vector would also be possible. We found the correct DNA in a pET28a vector and transformed
 +
it in BL21 cells. Two different mutants of CT52 were found, so both were transformed.
 +
</p>
 +
<p>
 +
In addition, a NanoLuc part was registered in the Part Registry. We want to also characterize NanoLuc, so we need to express this protein
 +
as well. We were able to get the DNA sequence of NanoLuc in a pET-28a vector.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal124">
 +
                  Wednesday September 18, 2019 - Small cultures, digestion, ligation & transformation     
 +
            </div>
 +
                <div class="modal" id="modal124">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday September 18, 2019 - Small cultures, digestion, ligation & transformation  </h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
There were no colonies on the plates inoculated with the new ligation mixtures made yesterday, except for only a single one resulting from the BRETp2 + BRETp3 + vector
 +
ligation. We suspect the ligation failed to yield the desired plasmid and will perform colony PCR tomorrow.
 +
</p>
 +
<p>
 +
DNA was extracted from yesterday's gel slices containing the relevant digested parts (<mark class="pink">/SacI/</mark>-BRETp2-<mark class="green">/NheI/</mark>; <mark class="green">/NheI/</mark>-BRETp3-<mark class="yellow">/XhoI/</mark>;
 +
/AgeI/-pET28a(+)-dCas9-Lbit-<mark class="pink">/SacI/</mark>) using the Qiagen gel extraction kit. With these, new ligation reactions were performed for ligating
 +
<mark class="pink">/SacI/</mark>-BRETp2-<mark class="green">/NheI/</mark> in <mark class="green">/NheI/</mark>-pET28a(+)-dCas9-Lbit-<mark class="pink">/SacI/</mark> as well as <mark class="green">/NheI/</mark>-BRETp3-<mark class="yellow">/XhoI/</mark> in <mark class="yellow">/XhoI/</mark>-pET28a(+)-dCas9-Lbit-<mark class="green">/NheI/</mark> prepared previously.
 +
</p>
 +
<h3>Characterization</h3>
 +
<h4>CT52-mNeonGreen</h4>
 +
<p>
 +
Transformation was successful for both mutant forms of CT52. Small cultures were made using kanamycin and LB medium.
 +
</p>
 +
<h4>NanoLuc</h4>
 +
<p>
 +
The vector for NanoLuc did not contain enough DNA, so we first need to replicate the plasmid DNA. Therefore, transformation in NovaBlue was performed.
 +
</p>
 +
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal125">
 +
                  Thursday September 19, 2019 - Testing & expression     
 +
            </div>
 +
                <div class="modal" id="modal125">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday September 19, 2019 - Testing & expression</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
It would be possible that the crRNA + tracrRNA is not working. Therefore, we decided to order complete sgRNA with IDT. Today we tested with
 +
the new sgRNA. The samples were incubated for 30 minutes at 37 °C and sgRNA was added in a 6x molar excess. NanoGlo was added in a 2000x dilution.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit | <i>5mM DTT present in PBS </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM target DNA |<i> 5 mM DTT present in PBS</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + non-target DNA |5 mM DTT present in PBS </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 10 |<i>5 mM DTT present in PBS </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 17 | <i>5 mM DTT present in PBS</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 25 | <i>5 mM DTT present in PBS </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit |<i> no DTT </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM target DNA | <i>no DTT</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + non-target DNA |<i> no DTT</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 10 | <i>no DTT</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 17 |<i> no DTT</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM target DNA interspace distance 25 |<i> no DTT</i></li>
 +
</ol>
 +
<bluetext><b>Native-PAGE</b></bluetext> to determine if dCas9 binds to the target sequence.
 +
</p>
 +
<p>
 +
Native PAGE sample and running buffer were prepared. Samples were made, many controls were included (see below). Samples were loaded on the gel
 +
and afterwards the gel was stained with SYBRGold to stain the DNA. Furthermore, the gel was stained with Coomassie overnight.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
No colonies were present, indicating that ligation had failed once again. The ligation of part 2 was repeated and the ligation mixtures of yesterday
 +
were transformed again in NovaBlue cells. In addition, colony PCR of the single colony on the plate of 17/09 was performed. The positive control
 +
showed the correct band on the gel, but the colony did not.
 +
</p>
 +
<h3>Characterization</h3>
 +
<h4>CT52-mNeonGreen</h4>
 +
<p>
 +
Two 1L large cultures were made (1 for each small culture) using kanamycin and LB medium. Small cultures were added to the large cultures and
 +
incubated at 37 °C and 160 rpm until OD600 = 0.6-0.7. Expression was induced at OD600 = 0.6 by adding IPTG.
 +
</p>
 +
<h4>NanoLuc</h4>
 +
<p>
 +
Transformation was not successful. The transformation of BRET ligation was not successful as well, so it would be possible that something
 +
went wrong during the transformation experiment. Therefore, transformation was performed again, in BL21.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal126">
 +
                  Friday September 20, 2019 - Purification     
 +
            </div>
 +
                <div class="modal" id="modal126">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday September 20, 2019 - Purification</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
The native PAGE gel was destained with water and images were taken using ImageQuant. However, the gel took very long to run and we encountered
 +
some problems. Therefore, the gel did not run long enough to be able to distinguish between bands.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
No colonies were present after transformation of the 1:1 ligation. There were some small colonies on the 2:1 ligation plate, which will be analyzed
 +
using colony PCR next week.
 +
</p>
 +
<h3>Characterization</h3>
 +
<h4>NanoLuc</h4>
 +
<p>
 +
The transformation was successful.
 +
</p>
 +
<h4>mNeonGreen</h4>
 +
<p>
 +
The large cultures were centrifuged, the pellets were dissolved and lysed with BugBuster. The lysate was purified with IMAC chromatography. The
 +
protein concentration were measured with NanoDrop. No protein was measured and the pellet after expression was not green, so the expression had
 +
probably failed.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal127">
 +
                  Monday September 23, 2019 - Colony PCR & testing   
 +
            </div>
 +
                <div class="modal" id="modal127">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday September 23, 2019 - Colony PCR & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
Sequencing was not successful last week, so new sequencing samples were made.
 +
</p>
 +
<p>
 +
In addition, additional tests were performed. A new buffer was used containing 20 mM Tris-HCl, 100 mM KCl, 5 mM MgCl<sub>2</sub>and 5% glycerol.
 +
30 μL samples were made and 2000x diluted NanoGlo was added. We used 2 different protein batches; one batch that was purified on 22-08
 +
and one batch that was purified on 27-08.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit | <i>Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM DNA 1 |<i> Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 |<i> Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM non-target DNA | <i>Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 1 |<i> Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 2|<i> Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 3 |<i> Proteins from 22-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit |<i> Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + DNA 1|<i> Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 | <i>Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM non-target DNA| <i>Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 1 |<i> Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 2 |<i> Proteins from 27-08</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + DNA 3 |<i> Proteins from 27-08</i></li>
 +
</ol>
 +
<h3>BRET</h3>
 +
<p>
 +
Colony PCR was performed using the colonies from the transformation of 20/09. However, colony PCR failed
 +
since the positive control showed a band at the correct height, but all samples did not show any band.
 +
</p>
 +
<h3>Characterization</h3>
 +
<h4>mNeonGreen</h4>
 +
<p>
 +
Protein expression was not successful, so sequencing samples were made to check whether the DNA sequence is correct. Sequencing samples
 +
were made using the T7 FOR primer. The sequencing samples showed that a part of the mNeonGreen sequence was not correct. Therefore, we
 +
decided to use a different part for characterization.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal128">
 +
                  Tuesday September 24, 2019 - Small cultures   
 +
            </div>
 +
                <div class="modal" id="modal128">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday September 24, 2019 - Small cultures</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Characterization</h3>
 +
<p>
 +
Small cultures were made for NanoLuc.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal129">
 +
                  Wednesday September 25, 2019 - Testing 
 +
            </div>
 +
                <div class="modal" id="modal129">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday September 25, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We found out that we miscalculated the DNA concentration, so we have been using 6 pM DNA instead of 6 nM DNA. Therefore, we have only been measuring
 +
background signal. New tests were performed using the correct DNA amounts. 30 μL samples were created with a 2 nM protein concentration, a 6x molar
 +
excess of sgRNA and a 6 nM DNA concentration. The protein with sgRNA was incubated at 37 °C for 10 minutes and incubation of the complex with DNA was
 +
done for 30 minutes at room temperature. For half of the samples the sgRNA was incubated at 50 °C for 5 minutes before use, which could avoid secondary
 +
structure formation of the sgRNA before incubation with dCas9.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 3 (interspace distance 25) | <i>sgRNA incubation at 37 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 2 (interspace distance 17) | <i>sgRNA incubation at 37 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 1 (interspace distance 10) | <i>sgRNA incubation at 37 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM non-target DNA | <i>sgRNA incubation at 37 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 | <i>sgRNA incubation at 37 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM non-target DNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 3 (interspace distance 25) |<i> sgRNA incubation at 50 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 2 (interspace distance 17) |<i> sgRNA incubation at 50 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 1 (interspace distance 10) |<i> sgRNA incubation at 50 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM non-target DNA |<i> sgRNA incubation at 50 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 | <i>sgRNA incubation at 50 °C</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM non-target DNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 2A + sgRNA 1B + target DNA | <i>sgRNA incubation at 50 °C</i></li>
 +
</ol>
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
After extracting the digested parts and backbones from yesterday's agarose gel using the Qiagen gel extraction kit , we tried two more
 +
single insert ligations for creating our BRET sensor construct:
 +
<ul class="list">
 +
<li><mark class="green">/NheI/</mark>-BRETp3 -<mark class="yellow">/XhoI/</mark> in <mark class="yellow">/XhoI/</mark>-pET28a(+) -<mark class="green">/NheI/</mark></li>
 +
<li><mark class="pink">/SacI/</mark>-BRETp2 -<mark class="green">/NheI/</mark> in <mark class="green">/NheI/</mark>-pET28a(+) -<mark class="pink">/SacI/</mark></li>
 +
</ul>
 +
</p>
 +
<p>
 +
Both were performed using T4 DNA ligase, in 20 and 25 μL reactions for BRETp2 and BRETp3 respectively and 50 ng backbone was used.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal130">
 +
                  Thursday September 26, 2019 - Testing 
 +
            </div>
 +
                <div class="modal" id="modal130">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday September 26, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
More tests were performed to find the optimal interspace distance. 30 μL samples were made in triplo. The sgRNA was incubated for 10 minutes
 +
at 50 °C before use. Subsequently, sgRNA and Sbit or Lbit was incubated for 10 minutes at 37 °C. The sgRNA:protein complex was incubated with
 +
DNA for 30 minutes at room temperature. NanoGlo was added in 2000x dilution just before testing.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + 1.2 nM DNA 3 (interspace distance 30) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 2 + 1.2 nM DNA 3 (interspace distance 27) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 3 (interspace distance 25) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + 1.2 nM DNA 2 (interspace distance 22) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 2 + 1.2 nM DNA 2 (interspace distance 20) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 2 (interspace distance 17) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + 1.2 nM DNA 1 (interspace distance 15) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 2 + 1.2 nM DNA 1 (interspace distance 12) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM DNA 1 (interspace distance 10) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 + 1.2 nM non-target DNA</li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 1 </li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM non-target DNA</li>
 +
<li>2 nM Sbit + 2 nM Lbit</li>
 +
</ol>
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
Unfortunately, the ligation reactions tried yesterday appear to have failed, again no colonies had grown on the plates. We ordered new
 +
gBlocks coding for the BRET sensor from IDT last night that are ready for Gibson assembly in our pET28a(+) vector, linearized by PCR.
 +
</p>
 +
<h3>Characterization</h3>
 +
<p>
 +
We had a meeting with one of our supervisors and we decided to characterize mCherry.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
 +
<div class="box middle notebook" data-modal="modal131">
 +
                  Monday September 30, 2019 - Testing 
 +
            </div>
 +
                <div class="modal" id="modal131">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday September 30, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
Bioluminescent tests were performed with centrifugation before testing to hopefully prevent aggregation. Samples of 30 μL
 +
were made using 2 nM protein, 1.2 nM DNA and a 6x molar excess of gRNA. NanoGlo was added in 2000x dilution to each sample.
 +
gRNA was incubated at 50 °C for 5 minutes prior to use. Subsequently, gRNA and protein were incubated at 37 °C for 20 minutes.
 +
DNA with the protein-gRNA complex was incubated at room temperature for 45 minutes.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit | <i>5 min centrifugation after incubation </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 non-target DNA | <i>5 min centrifugation after incubation</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3| <i>5 min centrifugation after incubation</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + 1.2 nM non-target DNA | <i>5 min centrifugation after incubation</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + DNA 3 | <i>5 min centrifugation after incubation</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit </i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 non-target DNA</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + 1.2 nM non-target DNA</i></li>
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA 3 + DNA 3</i></li>
 +
</ol>
 +
</p>
 +
<h3>Characterization preparation</h3>
 +
<h4>Cysteine free NanoLuc</h4>
 +
<p>
 +
Transformation in BL21 was done.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<h2>October</h2>
 +
 +
 +
<div class="box middle notebook" data-modal="modal132">
 +
                  Tuesday October 1, 2019 - Small cultures 
 +
            </div>
 +
                <div class="modal" id="modal132">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday October 1, 2019 - Small cultures</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Characterization preparation</h3>
 +
<h4>Cysteine free NanoLuc</h4>
 +
<p>
 +
Colonies were present, so small cultures were made.
 +
</p>
 +
<h4>mCherry</h4>
 +
<p>
 +
Small cultures were made from a glycerol stock with mCherry in BL21.
 +
Furthermore, large culture media were prepared for expression of cysteine free NanoLuc and mCherry.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal133">
 +
                  Wednesday October 2, 2019 - Expression & testing 
 +
            </div>
 +
                <div class="modal" id="modal133">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday October 2, 2019 - Expression & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We performed test with a variable protein concentrations. We used the concentrations 2 nM, 1 nM and 0.5 nM. We used 30 μL samples using the Tris-HCl
 +
buffer containing BSA and DTT. DNA concentrations of 1.2 nM and a gDNA 6x molar excess were used. gRNA was incubated at 50 °C for 10 minutes.
 +
Incubation of Sbit and Lbit with gRNA was performed for 20 minutes at 37 °C, and subsequently incubation with DNA was done for 45 minutes at room
 +
temperature. NanoGlo was added in 2000x excess.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit</li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM nontarget DNA</li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA</li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA + 1.2 nM nontarget DNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA + 1.2 nM DNA 3 (interspace distance 30) </li>
 +
<li>1 nM Sbit + 1 nM Lbit</li>
 +
<li>1 nM Sbit + 1 nM Lbit + 1.2 nM nontarget DNA</li>
 +
<li>1 nM Sbit + 1 nM Lbit + gRNA</li>
 +
<li>1 nM Sbit + 1 nM Lbit + gRNA + 1.2 nM nontarget DNA </li>
 +
<li>1 nM Sbit + 1 nM Lbit + gRNA + 1.2 nm DNA 3 (interspace distance 30) </li>
 +
<li>0.5 nM Sbit + 0.5 nM Lbit </li>
 +
<li>0.5 nM Sbit + 0.5 nM Lbit + 1.2 nM nontarget DNA</li>
 +
<li>0.5 nM Sbit + 0.5 nM Lbit + gRNA</li>
 +
<li>0.5 nM Sbit + 0.5 nM Lbit + gRNA + 1.2 nM nontarget DNA </li>
 +
<li>0.5 nM Sbit + 0.5 nM Lbit + gRNA + 1.2 nM DNA 3 (interspace distance 30) </li>
 +
</ol>
 +
</p>
 +
<h3>Characterization</h3>
 +
<h4>mCherry & Cysteine-free NanoLuc</h4>
 +
<p>
 +
The expression of cysteine free NanoLuc and mCherry was activated by adding 1 mM IPTG at OD 0.5. The large cultures were incubated overnight
 +
18 °C at 160 rpm.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal134">
 +
                  Thursday October 3, 2019 - Testing & purification
 +
            </div>
 +
                <div class="modal" id="modal134">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday October 3, 2019 - Testing & purification</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We performed tests using variable concentrations of mNeonGreen-NanoLuc to determine which concentration we would be using in our experiments later on.
 +
30 μL samples were used in the Tris-HCl, MgCl<sub>2</sub>buffer containing DTT and BSA. NanoGlo was added in 2000X dilution.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit + sgRNA + 1.2 nM DNA 3 (interspace distance 30) </li>
 +
<li>0.1 pM mNeonGreen-NanoLuc</li>
 +
<li>0.2 pM mNeonGreen-NanoLuc</li>
 +
<li>1 pM mNeonGreen-NanoLuc</li>
 +
<li>2 pM mNeonGreen-NanoLuc</li>
 +
<li>5 pM mNeonGreen-NanoLuc</li>
 +
<li>10 pM mNeonGreen-NanoLuc</li>
 +
<li>20 pM mNeonGreen-NanoLuc</li>
 +
</ol>
 +
</p>
 +
<h3>mCherry</h3>
 +
<p>
 +
The large culture of mCherry was purified with Nickle affinity chromatography.
 +
</p>
 +
<p>
 +
Fluorescence was measured.
 +
<ul class="list">
 +
<li>96 Well plate</li>
 +
<li>A7. 1nM mCherry</li>
 +
<li>A8. 1pM mCherry</li>
 +
<li>A9. 10 pM mCherry</li>
 +
<li>A10. 100 pM mCherry</li>
 +
<li>A11. 10 nM mCherry</li>
 +
</ul>
 +
</p>
 +
<h3>Cysteine free NanoLuc</h3>
 +
<p>
 +
The large culture was purified with Nickle affinity chromatography. After elution
 +
a concentration of 1.36 mg/ml was measured with Nanodrop. Tomorrow the elution will be further purified with the strep tag.
 +
</p>
 +
<h3>Phage experiments</h3>
 +
<p>
 +
One of us went to the MCT lab of the QAMH Brussels to discuss with Dr. Pirnay about the experiments we would like to perform
 +
with phages. A 100 μL sample of T7 phages with a high titer of 10<sup>11</sup>PFU/mL was also taken back to Eindhoven to denature by heat
 +
and allow for testing our split-NL sensor on whole T7 genome.
 +
</p>
 +
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal135">
 +
                  Friday October 4, 2019 - PCR for Gibson & Testing
 +
            </div>
 +
                <div class="modal" id="modal135">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday October 4, 2019 - PCR for Gibson & Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
T7 phages were heat denatured at 70 °C for 2 hours. The phage DNA was then tested. A 2 nM protein concentration, ±0.1 nM phage DNA concentration and
 +
6x excess of gRNA was used. The gRNA was incubated at 50 °C before use. The gRNA with protein was incubated at 37 °C for 10 minutes and subsequently
 +
the gRNA-protein complex was incubated with DNA for 30 minutes at room temperature. NanoGlo was then added in a 1000x dilution.
 +
<ol class="list">
 +
<li>2 nM Sbit + 2 nM Lbit</li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM nontarget DNA</li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit + 1.2 nM nontarget DNA + gRNA </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 1 + 0.1 nM T7 phage DNA (interspace distance 17) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 2 + 0.1 nM T7 phage DNA (interspace distance 20) </li>
 +
<li>2 nM Sbit + 2 nM Lbit + gRNA 3 + 0.1 nM T7 phage DNA (interspace distance 22)</li>
 +
</ol>
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
The backbone required for the new Gibson assembly strategy we will try next week were linearized from the original pET28a(+)-split-NL vector by PCR
 +
in two variants:
 +
<ul class="list">
 +
<li>One complete backbone was made (A, ca. 5.3 kb)</li>
 +
<li>The same backbone was prepared as two parts with a 20 bp mutual overlap for Gibson assembly (B and C, ca. 2.7 and 2.6 bp respectively).</li>
 +
</ul>
 +
Afterwards, the resulting PCR mixtures were PCR purified and samples were run on an agarose gel to check for correct PCR products.
 +
</p>
 +
<h3>mCherry & Cysteine free NanoLuc</h3>
 +
<p>
 +
The samples from the purification were put on an SDS-PAGE gel.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal136">
 +
                  Monday October 7, 2019 - Gibson Assembly
 +
            </div>
 +
                <div class="modal" id="modal136">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Monday October 7, 2019 - Gibson Assembly</h2></div>
 +
                        <div class="modal-body">
 +
<h3>BRET</h3>
 +
<p>
 +
Gibson assembly was performed, one sample with one backbone and one sample with the backbone in 2 parts. A gibson assembly control was also included.
 +
The samples were transformed in XL10-Gold and plated.
 +
</p>
 +
<h3>mCherry</h3>
 +
<p>
 +
Dilutions were made of 100 nm, 1 μM and 10 μM. The excitation and emission spectrum were measured. The effect of photobleaching after 10 min, 20 min and
 +
30 min UV light exposure was also measured.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal137">
 +
                  Tuesday October 8, 2019 - Gibson Assembly & testing
 +
            </div>
 +
                <div class="modal" id="modal137">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Tuesday October 8, 2019 - Gibson Assembly & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We ordered new DNA gBlocks, so we would be able to test interspace distances 30-60 bp. Tests were performed using 2 nM protein, 1.2 nM DNA and a 6x
 +
molar excess of gRNA. gRNA was incubated at 50 °C before use and the gRNA and protein were incubated at 37 °C for 20 minutes. Subsequently, the gRNA-protein
 +
complex was incubated with DNA for 45 minutes at room temperature. NanoGlo was added in 2000x dilution.
 +
</p>
 +
<h3>BRET</h3>
 +
<p>
 +
No colonies were present on all the plates. The control plates also had no colonies, but we discovered that the wrong plates were used because the control was
 +
not kanamycin resistant. The gBlocks were PCRed and Gibson assembly was tried again and the samples were transformed in XL10-Gold ultracompetent cells. The
 +
samples from Gibson assembly yesterday were put on an agarose gel.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal138">
 +
                  Wednesday October 9, 2019 - Gibson Assembly & testing
 +
            </div>
 +
                <div class="modal" id="modal138">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Wednesday October 9, 2019 - Gibson Assembly & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
To improve the signal-to-noise ratio, we decided to test with higher protein concentrations. We used interspace distance 30 for testing, since this gave the
 +
highest signal in previous tests. We under the same conditions as the previous tests, but we used the protein concentrations 2, 5 and 10 nM.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal139">
 +
                  Thursday October 10, 2019 - Transformation & testing
 +
            </div>
 +
                <div class="modal" id="modal139">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Thursday October 10, 2019 - Transformation & testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We tested multiple protein concentrations to see what range can be used for testing. We expected that the background signal would increase for high protein
 +
concentrations. Yesterday we saw that 10 nM protein concentration gave a good signal-to-noise ratio. Today we tested 2, 10, 20, 50 and 100 nM.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
<div class="box middle notebook" data-modal="modal140">
 +
                  Friday October 11, 2019 - Testing
 +
            </div>
 +
                <div class="modal" id="modal140">
 +
                    <div class="modal-content">
 +
                        <div class="modal-header"><button class="icon modal-close">&times;</button><h2>Friday October 11, 2019 - Testing</h2></div>
 +
                        <div class="modal-body">
 +
<h3>Split-NL</h3>
 +
<p>
 +
We tested the limit of detection of our sensor using 2 nM and 10 nM protein. A range of DNA concentrations from 1 pM to 10 nM was tested. The incubation
 +
conditions were the same as in previous tests and NanoGlo was added in 2000x dilution.
 +
</p>
 +
                        </div>
 +
                    </div>
 +
                </div>
 +
 +
 +
 +
 +
 +
 
             </div>
 
             </div>
 
             </div>
 
             </div>

Revision as of 09:47, 15 October 2019

Lab Notebook

Here you can find short summaries of all the work we did in the lab. You can click on the boxes for more information. More information about our achievements outside the lab is shown on the Milestones page.

June

Monday June 17, 2019 - Stocks
Tuesday June 18, 2019 - Transformation
Wednesday June 19, 2019 - Small culture
Thursday June 20, 2019 - Miniprep & protein expression
Friday June 21, 2019 - Digestion & protein pellets
Monday June 24, 2019 - Ligation & column preparation
Tuesday June 25, 2019 - Purification & small culture
Wednesday June 26, 2019 - Miniprep & SDS-PAGE
Thursday June 27, 2019 - SDS-PAGE, sequencing & new LB stock
Friday June 28, 2019 - 2nd Transformation Sbit, IPTG stock & New plan expression

August

Tuesday August 13, 2019 - Reorganization
Wednesday August 14, 2019 - Digestion, PCR amplification
Thursday August 15, 2019 - Meeting with supervisors
Friday August 16, 2019 - Gibson Assembly primers design
Monday August 19, 2019 - Transformation & ligation
Tuesday August 20, 2019 - Small culture & digestion
Wednesay August 21, 2019 - Large culture, ligation & digestion
Thursday August 22, 2019 - Purification, PCR
Friday August 23, 2019 - SDS & Bioluminescence test
Monday August 26, 2019 - Transformation
Tuesday August 27, 2019 - Sequencing & purification
Wednesday August 28, 2019 - Small cultures & SDS gel
Thursday August 29, 2019 - Expression & Q-Tof sample
Friday August 30, 2019 - Purification

September

Monday September 2, 2019 - Testing
Tuesday September 3, 2019 - Testing
Wednesay September 4, 2019 - Colony PCR
Tuesday September 5, 2019 - Testing
Monday September 9, 2019 - Small culture & Gibson
Tuesday September 10, 2019 - Sequencing samples & testing
Wednesay September 11, 2019 - Overhang PCR
Tuesday September 12, 2019 - Testing & Transformation
Monday September 16, 2019 - Ligation & transformation
Tuesday September 17, 2019 - Ligation & transformation
Wednesday September 18, 2019 - Small cultures, digestion, ligation & transformation
Thursday September 19, 2019 - Testing & expression
Friday September 20, 2019 - Purification
Monday September 23, 2019 - Colony PCR & testing
Tuesday September 24, 2019 - Small cultures
Wednesday September 25, 2019 - Testing
Thursday September 26, 2019 - Testing
Monday September 30, 2019 - Testing

October

Tuesday October 1, 2019 - Small cultures
Wednesday October 2, 2019 - Expression & testing
Thursday October 3, 2019 - Testing & purification
Friday October 4, 2019 - PCR for Gibson & Testing
Monday October 7, 2019 - Gibson Assembly
Tuesday October 8, 2019 - Gibson Assembly & testing
Wednesday October 9, 2019 - Gibson Assembly & testing
Thursday October 10, 2019 - Transformation & testing
Friday October 11, 2019 - Testing

Milestones

Throughout the competition, a lot of milestones were achieved inside and outside the lab. Below you can find the list of the most important milestones we achieved together with our team.

February 6, 2019 - Kick-off meeting
March 27, 2019 - Team complete
March 28, 2019 - Officially registered for iGEM
April 15, 2019 - First meeting with an expert, Chris Arts
April 23, 2019 - Reached the top 40 of the TU/e contest
April 24, 2019 - Arrival of the iGEM distribution kit
May 2, 2019 - First team bonding activity
May 13, 2019 - Offical iGEM TU Eindhoven 2019 design
May 20, 2019 - Reached the top 20 of the TU/e contest
May 22, 2019 - Netherlands Biotechnology Congress (NBC), Ede
May 28, 2019 - First meeting at Queen Astrid Military Hospital, Brussels, with Jean-Paul Pirnay
June 6, 2019 - 2nd place at TU/e contest final event
June 11, 2019 - New office
June 13, 2019 - iGEM Europe meetup, The Hague
June 13, 2019 - First patient talk, Queen Astrid Military Hospital, Brussels
June 14, 2019 - Phage therapy symposium, Queen Astrid Military Hospital, Brussels
June 17, 2019 - First day in the lab, because of arrival vector
June 17, 2019 - Arrival team clothing and team photoshoot
July 11, 2019 - First sponsor: DSM
July 17, 2019 - Article about iGEM TU Eindhoven on FMT gezondheidszorg
August 17, 2019 - Dutch Meet-Up Leiden and Groningen
August 22, 2019 - Formation of our dCas9-Split-NanoLuc
August 26, 2019 - Crowdfunding online
August 26, 2019 - Official GO for the team
August 29, 2019 - Booking of tickets to Boston
September 2, 2019 - Team project name: dCastect
September 7, 2019 - Reaching 50% of our crowdfunding campaign
September 19, 2019 - Second team bonding evening
September 21, 2019 - Article in the Eindhovens Dagblad (ED)
September 21, 2019 - Reaching 100% of our crowdfunding campaign
September 25, 2019 - Positive test results of our dCas9-Split-NanoLuc
October 2, 2019 - Arrival Postcards Duesseldorf collaboration
October 7, 2019 - Performing our phage experiments at the QAMH in Brussels
October 22, 2019 - Successful Wiki Freeze!
October 25, 2019 - BeNeLux Mini Jamboree, Eindhoven