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[Kinetics of reactions in polyenzyme systems. III. Electron transport processes].

Kinetic relationships of electron transport processes in biological systems have been analysed. Formal-kinetic description and discrimination of the two main models of electron transport processes in systems of homogeneously distributed carriers and in systems of structurally bound carriers is presented including steady-state and non-steady-state reaction kinetics. Methods of determination of limit-stage rate constant and rate constants for all elementary steps of the reaction are given. Dependencies of the degree of electron carriers reduction on donor and acceptor concentrations and the influence of reduction or oxidation of carriers on the kinetic properties of electron transport chain (electron influence factor) in the system of structurally-bound carriers have been analyzed. On the basis of kinetic models a molecular-kinetic interpretation of activation effect of mitochondrial respiratory chain during the process of electron transport is offered.