Part:BBa_J61032:Experience
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Applications of BBa_J61032
[http://2012.igem.org/Team:Technion Team Technion (2012)] have made an assay using this part. The BioBrick they used is BBa_K784000.
We have used the part inside a BL21 strain of E.coli which has an endogenouse PET system.
In the presence of IPTG inducer, T7 RNAP is expressed and activates the part promoter which expresses the Alkaline Phosphatase gene (phoA).
The graph below presents the results of the experiment described. The absorbance at 420nm for each of the different concentrations of the inducer in a range of 0.5 μΜ to 1000 μΜ on a logarithmic scale. The absorbance was calculated via different dilutions of the samples: dilutions by 0.5, by 0.25, and by 0.1. The error bars represent the processing of the data collected. The line at the bottom of the graph represents the basal level according to the control result- no IPTG induction.
As can be seen, the graph shows a clear positive tendency- the higher the concentration the higher the absorption, as expected. Starting from a concentration of 40 μM and above, there are only small deviations from the absorption value of 1.2, probably due to the fact that saturation has been achieved.
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