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      <p class="habstract">Abstract</p>
      <div id="pabstract"><p>Widespread algal blooms cause extensive damage in ecosystems. Compared to physical or chemical methods, biological treatment for algal bloom is less expensive and more environmentally friendly. Peking iGEM is dedicated to constructing engineered microorganisms for the elimination of algae and recovery of ecosystems.</p>
<p>An antimicrobial lysozyme was introduced to kill algae since lysozyme could disrupt the outer membrane of algae. In addition, we equipped our transgenic cells with features that allow for buoyancy and attachment, making our project more efficient. During this process, an enzyme is also secreted to degrade a deleterious product of algae. After eradicating the algae, our engineered bacteria will commit suicide, and the ecosystem is finally restored. </p>
<p>This project is an innovative treatment for water bloom, and has potential applications in the field of ecosystem remediation. 
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        <img src="https://static.igem.org/mediawiki/2014/0/07/Peking2014wcg_slideshow1.png"  alt="Demo2 first" />
        <div class="SliderName_2Description">Peking iGEM: <strong>Lab</strong></div>
        <div class="SliderName_2Description">Peking iGEM: <strong></strong></div>
        <img src="https://static.igem.org/mediawiki/2014/6/66/Peking2014wcg_slideshow11.png"  />
        <div class="SliderName_2Description">Peking iGEM: <strong>Peking iGEM Club</strong></div>
        <img src="https://static.igem.org/mediawiki/2014/5/5d/Peking2014wcg_slideshow5.png"  />
        <div class="SliderName_2Description">Peking iGEM: <strong>Fluorescence Picture</strong></div>
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      <p class="subgroupl"> <strong><a href="https://2014.igem.org/Team:Peking/Killing" style="text-decoration: none;">Killing:</a></strong><br />
        Killing the algae is the directly efficient way to reduce the algal bloom. Lysozyme was introduced to annihilate algae. The lysozyme could deconstruct the outer membrane of cyanobacteria and further lyse cyanobacteria. Lysozyme immune system was implemented to protect our genetically engineered <i>E. coli</i>. Our goal is to finally secrete lysozyme to kill algae without harming <i>E. coli</i>.  </p>
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      <p > <strong><a href="https://2014.igem.org/Team:Peking/KillingImprovements" style="text-decoration: none;" >Killing Improvements:</a></strong><br />
A lectin of the cyanobacteria was expressed on the surface of our <i>E. coli</i> cells so that <i>E. coli</i> can bind to the cyanobacteria. The experimental results accorded with computational models, indicating that binding of <i>E. coli</i> to the cyanobacteria greatly enhances the killing efficiency of our project. We also equipped our <i>E. coli</i> with gas vesicles so that our project can be feasible in the real ecosystems. 
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  <div id="mid2center" > <a href="https://2014.igem.org/Team:Peking/Overview"><img src="https://static.igem.org/mediawiki/2014/9/94/Peking2014wcg_homeprocess.png"  alt=""/> </a></div>
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      <p> <strong>This year, Peking iGEM aimed at treating the problem of algal bloom with synthetic biological tools. Genetically engineered <i>E. coli</i> was implemented to both reduce the algal biomass and degrade the toxin. </strong> </p>
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      <p> <strong><a href="https://2014.igem.org/Team:Peking/Degradation" style="text-decoration: none;">Degradation :</a></strong><br />
<i>Microcystis.aeruginosa</i> is the most common cyanobacteria during algal bloom, and can secrete microcystin, a deadly toxin. To decrease the negative effects of the toxin on water ecosystems, we introduced an engineered bacteria that can secrete a microcystinase-MlrA protein to hydrolyze the toxin.
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      <p> <strong><a href="https://2014.igem.org/Team:Peking/Suicide" style="text-decoration: none;">Suicide :</a></strong><br />
After killing algae and degrading toxin, the remaining bacteria should be eliminated or they would potentially cause negative effects to the environment. We constructed the suicide system using lysing system from phage, since <i>E. coli</i> should be controlled to commit suicide after accomplishing their mission.
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      <p> <strong><a style="text-decoration: none;" href="https://2014.igem.org/Team:Peking/BindingEvaluation">Modeling :</a></strong><br />
Our modeling focused on supporting the whole project. We used Monte Carlo simulation analyzed the enhancement of binding of <i>E. coli</i> to algae to the efficiency of killing. Another model about cellular burden was built to find optimal expressing efficiency. Furthermore, a macroscopic simulation that predicts the real situation would provide insight for the whole project. 
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  <div id="mid3center"> <img src="https://static.igem.org/mediawiki/2014/6/60/Peking2014wcg_process2.png" href="https://2014.igem.org/Team:Peking/Overview" alt=""/> </div>
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      <p> <strong><a style="text-decoration: none;" href="https://2014.igem.org/Team:Peking/TeamCom">Human Practice :</a></strong><br />
Investigation lies much beyond lab bench. Great insight would be discovered by <i>in field</i> study. We visited Taihu Lake, one of the biggest lake in China suffering algal bloom. We interviewed the researchers and acquired knowledge about algae in lake ecosystem. Besides, we were dedicated to communicating with other teams. We also established iGEM Club in Peking University to popularize iGEM competition. 
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