Medical Definition of Photosystem II
1.
Photosynthetic system in chloroplasts in which light of up to 680 nm is absorbed and its energy used to split water molecules, giving rise to a high energy reductant, Q and oxygen.
The reductant is the starting point for an electron transport chain that leads to photosystem I and that is coupled to the phosphorylation of ADP to ATP.
This entry appears with permission from the Dictionary of Cell and Molecular Biology
(11 Mar 2008)
Lexicographical Neighbors of Photosystem II
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