6IE9:
reference: Crystal structure of the multidrug resistance regulator RamR complexed with bile acids., Yamasaki S, Nakashima R, Sakurai K, Baucheron S, Giraud E, Doublet B, Cloeckaert A, Nishino K, Sci Rep. 2019 Jan 17;9(1):177. doi: 10.1038/s41598-018-36025-8. PMID: 30655545

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