Part:BBa_K245129:Experience

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CutA production using Linear expression cell-free kit

The protein produced using Ls70 linear expression cell-free kit, under the control of constitutive family member promotor (J23102 ) and strong RBS ( B0034). We identified protein concentration by measuring the absorbance at 280nm, concentration is calculated by beer’s law using the previously identified theoretical extinction coefficient. We plotted the time of reaction vs the concentration of the protein produced to characterize the part production using the linear cell-free kit.

Measuring cutA Binding Affinity

We identified the best production time which is 14 hours, then we expressed the protein to test its affinity of binding to copper and sodium based on the modeling results, using TDS meter,we measured the decrease of 159g/l and 70g/l copper sulfate and sodium chloride,respectively. We made replicates and took the average, CutA was able to decrease NaCl by 2 parts per million. However, it has a much higher affinity to copper where it reduced the amount of Copper sulfate by 0.3 part per thousand.

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