Part:BBa_K2100038:Experience

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Applications of BBa_K2100038

We characterized the repressor TAL21 by creating a plasmid, containing TAL21 under the control of a doxycycline inducible promoter, TRE. This allowed for us to modulate the repressor expression by varying the concentrations of doxycycline added. We also created a repressible promoter controlling the expression of a fluorescent protein. This plasmid allowed for us to measure the repression occurring.

In order for us to analyze the level of repression, we need to see sustained presence. Upon increasing the concentration of doxycycline, we were unable to see that sustained presence. From the results of testing TAL21 below, it can be seen that although there is activation early on, the production of repressor falls at 500 nM. This could possible be due to errors in doxycycline dilutions at 500 nM and above.

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