1H68:
reference: X-ray structure of sensory rhodopsin II at 2.1-A resolution., Royant A, Nollert P, Edman K, Neutze R, Landau EM, Pebay-Peyroula E, Navarro J, Proc Natl Acad Sci U S A 2001 Aug 28;98(18):10131-6. PMID: 11504917

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