Team:SUSTC-Shenzhen-A/Project

There are many applications of the game theory in some aspects of our life. Each individual has two kinds of choices--to betray or stay silent, and the choice you make would determine your fate. To betray the other side, you may risk being revenged. While staying silent, companion's betrayal may hurt you deeply. As for our project, we work out a new way to imitate the game theory by constructing a community of two E. Coli bacteria. Here we use the growth rate of each species to represent its fate. The effect of one's silent or betrayal on the other species' fate is acted through intercellular signal molecules of two quorum sensing systems. Each signal molecule regulates the expression of toxic genes in the other species and reduces its growth rate. We characterize the consequence of each strategy by quantitatively measure the growth rates of each species in the community

Background

Project Details

our design

Part 2

The Experiments

Part 3

Results

Biobricks checking

We chose four biobricks to detect after search . They are xylose、KNO₃、glucose and 12HSL.

xylose KNO₃

Compared with the results of the efficiency of the xylose inducible promoter detected by the HKT, our consequence differed from them in some aspects, or better. We had used the FCM to detect it. There was an obvious tendency that the efficiency of the promoter increased as the xylose concentration gathered up. What was amazing was that the fluorescence we got was 10 times brighter than the result the HKT got, which appeared to be great.

But when the concentration of the xylose was 0.03% and 0.3%, we got an unexpected result that the expression of the GFP fell after rise. What’s more. While the concentration of the xylose was 10%, the expression of the GFP decreased, which corresponded with the result of the HKT.

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