Team:SUSTC-Shenzhen-B/lab introduction

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                    <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B" class="selected">Home</a></li>
 
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                    <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B">Project</a>
 
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                        <ul><li><span class="top"></span><span class="bottom"></span></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/introduction">Introduction</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/algorithm">Algorithm</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/modeling">Modeling</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/achievements">Achievements</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/future plan">Future Plan</a></li>
 
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                    <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B">Lab Work</a>
 
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                        <ul><li><span class="top"></span><span class="bottom"></span></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/lab introduction">Introduction</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/protocol">Lab Protocol</a></li>
 
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                            <li><a href="https://2012.igem.org/Team:SUSTC-Shenzhen-B/lab results">Lab Results</a></li>
 
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                 <h2>Introduction to the Lab Work</h2>
                 <h2>Introduction to the Lab Work</h2>
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                 <p>Our purpose of doing experiment is to validate our model and enrich our database.
                 <p>Our purpose of doing experiment is to validate our model and enrich our database.
The vector of our experiment is Psb1A3. Our task is to connect GFP and RFP to the plasmid. After the new backbone has been built, we connect terminator to this new vector. Then use flow cytometry to calculate the termination efficiency of the terminators.</p>
The vector of our experiment is Psb1A3. Our task is to connect GFP and RFP to the plasmid. After the new backbone has been built, we connect terminator to this new vector. Then use flow cytometry to calculate the termination efficiency of the terminators.</p>
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Revision as of 02:20, 8 September 2012

SUSTC iGEM Theme - Free CSS Template

SUSTC iGEM Theme - Free CSS Template

SUSTC iGEM Theme - Free CSS Template

Introduction to the Lab Work

Our purpose of doing experiment is to validate our model and enrich our database. The vector of our experiment is Psb1A3. Our task is to connect GFP and RFP to the plasmid. After the new backbone has been built, we connect terminator to this new vector. Then use flow cytometry to calculate the termination efficiency of the terminators.

The goal of BioBrick is to standardize the form of genetic components to allow idempotent reactions where the key structural elements of a component are unchanged by the reactions. So BioBrick provide a standard method of assembling genetic components using specified prefixes and suffixes. Prefixes include EcoRⅠ and XbaⅠ; suffixes include SpeⅠ and PstⅠ. The recognition site of XbaⅠ: The recognition site of SpeⅠ: They have the same cohesive terminus so they can connect together. However, after the combination, neither XbaⅠnor SpeⅠ can recognize this sequence. According to this way can we achieve the goal of BioBricks. We can see from the picture that there are 4 standard restriction enzyme cutting sites: EcoRⅠ, XbaⅠ, SpeⅠ,PstⅠ.

1. Because we will use pstⅠto be the restriction cutting site of terminators, if we want to ligase GFP to the plasmid, this restriction cutting site should be mutated. The recognition site of PstⅠ: The recognition site of AflⅡ: Since AflⅡis like PstⅠ,they just have 2 different base-pairs, we use PtoA-F 5'-CCACCTGACGTCTAAGAAAC-3' PtoA-R 5'-CTTAAGCGGCCGCTACTAGTA-3' These primer to mutate the vector.

2. After the mutation is successful, the next step is to connect GFP & RFP to the vector. The GFP and RFP were built by PCR extension. To digest GFP, we use SpeⅠand AflⅡ. We also digest the vector with the same restriction enzyme cutting sites. During the process of base complementary pairing, GFP can be ligated into the vector with the help of T4 DNA ligase. At the same time, the recognition site of PstⅠ has been added to the vector. To digest RFP, we use NotⅠ and SpeⅠ. We also digest the vector with the same restriction enzyme cutting sites. During the process of base complementary pairing, RFP can be ligated into vector with the help of T4 DNA ligase. At the same time, the recognition site of XbaⅠ has been added to the vector. We can either connect GFP, RFP and the plasmid these 3 fragments together or connect 2 fragments together first and then connect the other one. However, when we carry out the second scheme, we should consider which one should be connected first. According to the picture, we should connect GFP first. Besides: We designed these primers to amplify RFP. R-NPS-F 5'-TATAGCGGCCGCCTTAAGTAAGTAAGAGTATACG-3' R-NPS-R 5'-CGGAGACTAGTCTGCAGATCACATAAGTAAAGTGATAATC-3' We designed these primers to amplify GFP. G-SXA-F 5'-CTAGACTAGTTCTAGAGGCGGACTCACTATAGA-3' G-SXA-R 5'-CCGACTTAAGGGATCCTATAAACGCAG-3'

3. Until these steps, we have already built the vector well. We decided to use XbaⅠ,PstⅠto digest the vector. The terminators were built by PCR extension. Then we can ligated terminator into the backbone and transformed into competent cells. Characterization devices testing the performance of the terminators utilized fluorescent proteins to measure input and output and altered the arabinose transport system to control inputs. The fluorescence produced by the characterization devices were then measured using flow cytometry to calculate the termination efficiency of the terminators.