3UU5:
reference: A locally closed conformation of a bacterial pentameric proton-gated ion channel., Prevost MS, Sauguet L, Nury H, Van Renterghem C, Huon C, Poitevin F, Baaden M, Delarue M, Corringer PJ, Nat Struct Mol Biol. 2012 May 13. doi: 10.1038/nsmb.2307. PMID: 22580559

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