CHARGE RECOMBINATION OF PHOTOSYNTHETIC REACTION CENTERS IN DIFFERENT MEMBRANE MODELS

Photosynthetic reaction centres from Rhodobacter sphaeroides have been reconstituted in phospholipid vesicles, reverse micelles and organoge ls. The kinetics of charge recombination between the primary photo-oxi dised electron donor (P+) of the reaction centre and the primary (Q(A) (-)) and secondary (Q(B)(-)) quinone accepters have been investigated in each system. The dependence of the kinetic parameters on the quinon e concentration in reverse micelles and organogels has been studied. T o account for the observed multiphasic kinetics, the influence of syst em microstructure and of quinone concentration is considered.