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Published on: February 23, 2017
Light-induced conductivity changes of purple membrane suspensions in strong electrolytes
M A Slifkin1, I Bakarudin, S Bradley
1Department of Electronic and Electrical Engineering, University of Salford, UK.
Abstract:
Measurements have been made of the modulated light-induced changes in conductivity and the associated relaxation times of bacteriorhodopsin in a variety of strong electrolytes, both unbuffered and buffered. The effects of pH and temperature variation have been studied as well as the effect of adding valinomycin. Two relaxation times can be distinguished: a fast lifetime associated with protonation-deprotonation, and a slow lifetime associated with ion binding. The ion-binding effects appear to be cation specific.
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