What Mn Kß spectroscopy reveals concerning the oxidation states of the Mn cluster in photosystem II
The oxygen evolving complex, (OEC) in Photosystem II contains a Mn4Ca cluster and catalyses oxidation of water to molecular oxygen and protons, the most energetically demanding reaction in nature. The catalytic mechanism remains unresolved and the precise Mn oxidation levels through which the cluster cycles during functional turnover are controversial. Two proposals for these redox levels exist; the ‘high’ and ‘low’ oxidation state paradigms, which differ systematically by two oxidation...[Show more]
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