4V62:
reference: Cyanobacterial photosystem II at 2.9-A resolution and the role of quinones, lipids, channels and chloride., Guskov A, Kern J, Gabdulkhakov A, Broser M, Zouni A, Saenger W, Nat Struct Mol Biol. 2009 Mar;16(3):334-42. Epub 2009 Feb 15. PMID: 19219048

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