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Energized reaction-center P680 chlorophylls on photosystem II donate an electron to a loosely bound acceptor molecule, the quinone Q, on the stromal surface of the thylakoid membrane. The result is charge separation; a negative charge on the stromal side of the thylakoid membrane and a positive charge on the luminal side. [GOC:jid, ISBN:0716731363, ISBN:0816017360]
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