Photosystem II or PS II, found in oxygenic
photosynthetic organisms such as cynobateria or higher plants, is
the catalyst for the most energetically demanding reaction in
nature, the oxidation of water to molecular oxygen and protons.
The water oxidase in PS II contains a Mn4Ca cluster (oxygen
evolving complex, OEC), whose catalytic mechanism, despite
extensive investigation, remains unresolved. The precise
oxidation levels of the manganese is especially...[Show more]
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