Nonlinear electric response of the diffuse double layer to an abrupt charge displacement inside a biological membrane

Mostafa, Hamdy I.A. and Tóth-Boconádi, Rudolf and Dér, László and Fábián, László and Taneva, Stefka G. and Dér, András and Keszthelyi, Lajos (2022) Nonlinear electric response of the diffuse double layer to an abrupt charge displacement inside a biological membrane. BIOELECTROCHEMISTRY, 146. ISSN 1567-5394

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Abstract

In order to elucidate the old, still unsolved problem of how the diffuse electric double layer responds to an abrupt, intramolecular charge displacement inside a biological membrane, we investigated the fastest compo- nents of the light-induced electric signals of bacteriorhodopsin and its mutants, in numerous ionic and buffer solutions. The obtained data for temperature and solute concentration dependence were interpreted as a consequence of changes in the capacity of the diffuse double layer surrounding the purple membrane. The possible physiological consequences of this so far not demonstrated phenomenon are discussed.

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