2KOE:
reference: NMR solution structure of human cannabinoid receptor-1 helix 7/8 peptide: Candidate electrostatic interactions and microdomain formation., Tyukhtenko S, Tiburu EK, Deshmukh L, Vinogradova O, Janero DR, Makriyannis A, Biochem Biophys Res Commun. 2009 Sep 18. PMID: 19766594

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