During photosynthesis, which minerals are required in a splitting reaction?
Manganese and Chlorine
The splitting reaction in photosynthesis refers to photolysis of water, which occurs at the oxygen-evolving complex (OEC) on the lumenal side of photosystem II.
The OEC contains a Mn4CaO5 cluster that accumulates oxidising equivalents through the S-state cycle and abstracts electrons from water. Chloride ions are essential cofactors that stabilise the higher S-states and are required for the O-O bond forming step, while potassium and magnesium are not directly involved in water splitting.
Hence, the minerals required in the splitting reaction are Manganese and Chlorine.
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