2PRC: Photosynthetic Reaction Center From Rhodopseudomonas Viridis (Ubiquinone-2 Complex)
reference: The coupling of light-induced electron transfer and proton uptake as derived from crystal structures of reaction centres from Rhodopseudomonas viridis modified at the binding site of the secondary quinone, QB., Lancaster CR, Michel H, Structure 1997 Oct 15;5(10):1339-59. PMID: 9351808

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