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− | <div id=" | + | <div id= "week13"> |
− | + | <p><h5><B>Week 13</B></h5></p> | |
− | + | <p><h3><B>August 29, 2016:</B></h3></p> | |
− | + | <p> | |
− | + | <a href="#exp1"><h4> 232. Measure the amount of DNA extracted from the miniprep</h4></a><br/> | |
− | + | </p> | |
− | + | <p><h3><B>September 1, 2016:</B></h3></p> | |
− | <a href="#exp2"><h4> | + | <p> |
+ | <a href="#exp2"><h4> 233. Harvest the culture with Midiprep</h4></a><br/> | ||
</p> | </p> | ||
− | <p>< | + | <p><h3><B>September 2, 2016:</B></h3></p> |
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− | <a href="#exp3"><h4> | + | <a href="#exp3"><h4> 234. Growth of bacteria </h4></a><br/> |
− | <a href="#exp4"><h4> | + | <a href="#exp4"><h4> 235. Extraction of plasmid DNA </h4></a><br/> |
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− | <U> Aim:</U> | + | <U> Aim:</U> Measure the quantity of plasmid using a Nanodrop (Thermofisher) before sending for sequencing (inserts B1 and C2)<br/><br/> |
+ | <U>What we did in the lab:</U><br/> | ||
+ | <U>Materials:</U><br/> | ||
+ | • Nanodrop (Thermofisher)<br/> | ||
+ | • Elution buffer from QIAGEN kit<br/> | ||
+ | • Microbiology equipment (type of incubator, Bunsen burner, water bath, etc… Follow this <a href="https://2016.igem.org/Team:Pasteur_Paris/Science">link</a>)<br/><br/> | ||
− | + | <U>Method:</U><br/> | |
− | + | 1. Analyze absorbance at 260nm<br/> | |
− | + | 2. Clean the Nanodrop with water<br/> | |
− | + | 3. Make the blank with 1µl of elution buffer<br/> | |
− | + | 4. Put 1 µl of your sample on the Nanodrop<br/> | |
− | + | 5. Make the measure and clean the Nanodrop between each measure <br/><br/> | |
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− | + | <U>Results:</U><br/> | |
− | + | <table> | |
− | + | <caption align="bottom" align="center"><i><p>Table 1 : Absorbance</p></i></caption> | |
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<thead> | <thead> | ||
<tr> | <tr> | ||
− | <th> | + | <th>Absorbance at 260nm</th> |
− | <th> | + | <th>A<sub>260</sub></th> |
− | <th> | + | <th>A<sub>280</sub></th> |
+ | <th>A<sub>260/280</sub<</th> | ||
+ | <th>Concentration (ng/µl)</th> | ||
</tr> | </tr> | ||
</thead> | </thead> | ||
<tbody> | <tbody> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>A1(1)</p></strong></td> |
− | <td>0</td> | + | <td align="center"; valign="center">0.202 </td> |
− | <td>0 </td> | + | <td align="center"; valign="center">0.124</td> |
+ | <td align="center"; valign="center">1.62 </td> | ||
+ | <td align="center"; valign="center">10.1</td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>A1(2)</p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.259 </td> |
− | <td>/</td> | + | <td align="center"; valign="center">0.169</td> |
+ | <td align="center"; valign="center">1.53 </td> | ||
+ | <td align="center"; valign="center">13.0 </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>A2(1)</p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.179</td> |
− | <td>0. | + | <td align="center"; valign="center">0.105</td> |
+ | <td align="center"; valign="center">1.70 </td> | ||
+ | <td align="center"; valign="center">8.9 </td> | ||
</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p>2 | + | <td align="center"; valign="center"><strong><p>A2(2)</p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.179 </td> |
− | <td>0. | + | <td align="center"; valign="center">0.103</td> |
− | </tr> | + | <td align="center"; valign="center">1.73</td> |
− | + | <td align="center"; valign="center">8.9 </td> | |
− | + | </tr> | |
− | + | <tr> | |
− | + | <td align="center"; valign="center"><strong><p>A2(3)</p></strong></td> | |
− | + | <td align="center"; valign="center">0.098 </td> | |
− | + | <td align="center"; valign="center">0.052</td> | |
− | + | <td align="center"; valign="center">1.86 </td> | |
− | + | <td align="center"; valign="center">4.9 </td> | |
− | + | </tr> | |
− | + | <tr> | |
+ | <td align="center"; valign="center"><strong><p>A2(4)</p></strong></td> | ||
+ | <td align="center"; valign="center">0.152 </td> | ||
+ | <td align="center"; valign="center">0.099</td> | ||
+ | <td align="center"; valign="center">1.53</td> | ||
+ | <td align="center"; valign="center">7.6 </td> | ||
+ | </tr> | ||
+ | </tbody> | ||
+ | </table><br/> | ||
+ | <br/><br/><br/> | ||
</p> | </p> | ||
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</div> | </div> | ||
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− | + | <div class="lightbox" id="exp2"> | |
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− | <div class="lightbox" id=" | + | |
<figure> | <figure> | ||
− | + | <a href="#" class="closemsg"></a> | |
− | + | <figcaption> | |
− | + | <p><U> Aim:</U> To start a culture for Miniprep of insert C2 in pET43.1a in BL21(DE3) from 22/08 and A1/C2 in pET43.1a in TOP1O. <br/> | |
− | + | In order to obtain a large amount of plasmid, we need to grow the bacteria overnight. | |
+ | <br/><br/> | ||
+ | <U> Protocol:</U> follow in this <a href="https://static.igem.org/mediawiki/2016/4/4b/T--Pasteur_Paris--Bacterial_culture_protocol.pdf">link</a><br/><br/> | ||
+ | <U>What we did in the lab:</U><br/> | ||
+ | <U>Materials:</U><br/> | ||
+ | • Microbiology equipment (type of incubator, Bunsen burner, water bath, etc… Follow this <a href="https://2016.igem.org/Team:Pasteur_Paris/Science">link</a>) <br/> | ||
+ | • 50 ml erlenmeyers<br/> | ||
+ | • Carbenicillin 50 mg/ml<br/> | ||
+ | • LB medium<br/><br/> | ||
− | + | <U>Method:</U><br/> | |
− | + | 1. One colony is picked from the plates and shaken in 25.0 ml of LB supplemented with Carbenicillin at 50 µg/ml.<br/> | |
− | + | 2. The flask is placed in a shaking incubator at 37°C, 150 rpm overnight.<br/> | |
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− | + | </p> | |
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</figcaption> | </figcaption> | ||
</figure> | </figure> | ||
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− | + | <div class="lightbox" id="exp3"> | |
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− | <div class="lightbox" id=" | + | |
<figure> | <figure> | ||
− | + | <a href="#" class="closemsg"></a> | |
− | + | <figcaption> | |
− | + | <p><U> Aim:</U> Produce our protein in BL21(DE3) competent cells, the production is induced with IPTG once it reaches an optical density of 0.7.<br/><br/> | |
− | + | <U> Protocol:</U> follow in this <a href="https://static.igem.org/mediawiki/2016/a/a4/T--Pasteur_Paris--Protein_induction_protocol.pdf">link</a><br/><br/> | |
+ | <U>What we did in the lab:</U><br/> | ||
+ | <U>Materials:</U><br/> | ||
+ | • Two 2 l erlenmeyers<br/> | ||
+ | • LB (Luria broth)<br/> | ||
+ | • IPTG (0.1 M)<br/> | ||
+ | • Precultures in 25 ml Erlenmeyers<br/> | ||
+ | • UV spectrophotometer (Ultrospec 3100)<br/> | ||
+ | • Shaking incubator (INFORS HT)<br/> | ||
+ | • Centrifuge<br/> | ||
+ | • Buffer A (50mM Tris, 150mM of NaCl)<br/><br/> | ||
− | + | <U>Method:</U><br/> | |
− | + | 1. Put 1 l of LB in each erlenmeyer and make them warm with the shaking incubator at 37°C and 150 rpm.<br/> | |
− | + | 2. Once warmed, add 12.5 ml of preculture in each erlenmeyer.<br/> | |
− | + | 3. Let grow in the shaking incubator.<br/> | |
− | + | 4. Measure the absorbance with the UV spectrophotometer every 30min<br/> | |
− | + | <table> | |
− | + | <caption align="bottom" align="center"><i><p><U>Table 140 :</U> Optical Density</p></i></caption> | |
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<thead> | <thead> | ||
<tr> | <tr> | ||
− | <th> | + | <th>Time</th> |
− | <th> | + | <th>C2 (1)</th> |
− | <th> | + | <th>C2 (2)</th> |
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</tr> | </tr> | ||
</thead> | </thead> | ||
<tbody> | <tbody> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>9:36<sub>AM</sub></p></strong></td> |
− | + | <td align="center"; valign="center">0.024 </td> | |
− | <td>0. | + | <td align="center"; valign="center">0.023 </td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>10:06<sub>AM</sub></p></strong></td> |
− | <td> | + | <td align="center"; valign="center">0.049</td> |
− | <td>0. | + | <td align="center"; valign="center">0.046 </td> |
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</tr> | </tr> | ||
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− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>11:02<sub>AM</sub></p></strong></td> |
− | <td> | + | <td align="center"; valign="center">0.175</td> |
− | <td>0. | + | <td align="center"; valign="center">0.165</td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>11:36<sub>AM</sub></p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.395 </td> |
− | <td>0. | + | <td align="center"; valign="center">0.402 </td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>12:05<sub>AM</sub></p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.568</td> |
− | <td>0. | + | <td align="center"; valign="center">0.540 </td> |
− | + | </tr> | |
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− | </tr> | + | |
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>12:27<sub>AM</sub></p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.658 </td> |
− | <td>0. | + | <td align="center"; valign="center">0.638</td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>12:38<sub>AM</sub></p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.694 </td> |
− | <td>0. | + | <td align="center"; valign="center">0.680 </td> |
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</tr> | </tr> | ||
<tr> | <tr> | ||
− | <td><strong><p> | + | <td align="center"; valign="center"><strong><p>14:31<sub>PM</sub></p></strong></td> |
− | <td>0. | + | <td align="center"; valign="center">0.872 </td> |
− | <td>0. | + | <td align="center"; valign="center">0.859 </td> |
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− | + | </tbody> | |
− | + | </table></br> | |
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− | </table | + | |
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+ | 5. Add IPTG to reach a concentration of 0.1mM. (12:57<sub>AM</sub>)<br/> | ||
+ | 6. The last measure before induction is pelleted 3min at 8000g and stored at -20°C.<br/>
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+ | 7. Let induce overnight in the shaking incubator<br/> | ||
+ | 8. After 7 hours of induction, measure the OD<sub>600 nm</sub> and store the measure pelleted at -20°C.<br/> | ||
+ | 9. Centrifuge at 4500RPM the culture and throw out the supernatant, the pellet resuspended in 5ml of buffer A are stored at -80°C before protein extraction. | ||
+ | <br/><br/><br/> | ||
</p> | </p> | ||
</figcaption> | </figcaption> | ||
</figure> | </figure> | ||
</div> | </div> | ||
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+ | <div class="lightbox" id="exp4"> | ||
+ | <figure> | ||
+ | <a href="#" class="closemsg"></a> | ||
+ | <figcaption> | ||
+ | <p> | ||
+ | <U> Aim:</U> To perform a Midiprep to isolate plasmid DNA of pET43.1(a+) with the inserts A1/C2 from cultures made on the 1<sup>set</sup> of August. <br/> | ||
+ | The amplification method to increase the amount of plasmid is called Midiprep.<br/><br/> | ||
+ | <U> Protocol:</U> follow in this <a href="https://static.igem.org/mediawiki/2016/d/d5/T--Pasteur_Paris--Miniprep_protocol.pdf">link</a><br/><br/> | ||
+ | <U>What we did in the lab:</U><br/> | ||
+ | <U>Materials:</U><br/> | ||
+ | • 50 ml Falcon tube<br/> | ||
+ | • Shaking incubator (INFORS HT)<br/> | ||
+ | • Swing bucket centrifuge (JOUAN GR41)<br/> | ||
+ | • QIAGEN Miniprep kit</br> | ||
+ | • Microbiology equipment (type of incubator, Bunsen burner, water bath, etc… Follow this <a href="https://2016.igem.org/Team:Pasteur_Paris/Science">link</a>)<br/><br/> | ||
+ | |||
+ | <U>Method:</U><br/> | ||
+ | The protocol in step 1 ask for spinning at 6000g but we can only achieve 3500 g so we used 3500 g for 8 minutes. We will follow most of the protocol of QIAGEN Miniprep 2016 except for a few modifications, which we describe, therefore, below.<br/> | ||
+ | Follow QIAGEN kit steps with a final volume of 100 µl<br/> | ||
+ | <br/><br/><br/> | ||
+ | </p> | ||
+ | </figcaption> | ||
+ | </figure> | ||
+ | </div> | ||
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+ | </body> | ||
+ | </html> |