1QCA:
reference: Steroid recognition by chloramphenicol acetyltransferase: engineering and structural analysis of a high affinity fusidic acid binding site., Murray IA, Cann PA, Day PJ, Derrick JP, Sutcliffe MJ, Shaw WV, Leslie AG, J Mol Biol 1995 Dec 15;254(5):993-1005. PMID: 7500366

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