[Relation between the measured exchange constant and the microscopic structure of membrane channels]

Kinetics of transmembrane ion transport is studied in the framework of the Eyring's reaction rate theory. The exchange constant characterizing the process of approaching of the trace particle concentration to the equilibrium distribution is expressed in terms of the microscopic parameters of membrane channels. The obtained expression can be used to get additional information on channel structure from the comparison with the experiments on concentration decay of trace particles.