The Mechanism of H2O2 Production by the S2 State of the Oxygen-Evolving Complex
Hydrogen peroxide is known to be an efficient electron donor to the light reactions of photosystem II after the manganese has been removed from the oxygen-evolving complex (OEC) (1). This reaction, which oxidizes H2O2 to O2, is mediated by aqueous Mn2+ and can therefore be inhibited by EDTA (2). The functional OEC can also catalyze the oxidation of H2O2 to O2 by the two electron reduction of the S1 or S2 states which were generated by flashes of light (3).
KeywordsH202 Production Water Oxidation Light Reaction Reaction Center Complex Single Flash
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