3LS0:
reference: Crystal Structure of PsbQ from Synechocystis sp. PCC 6803 at 1.8 A: Implications for Binding and Function in Cyanobacterial Photosystem II., Jackson SA, Fagerlund RD, Wilbanks SM, Eaton-Rye JJ, Biochemistry. 2010 Apr 6;49(13):2765-7. PMID: 20210304

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