4MGJ:
reference: Structural and Functional Characterization of a Cytochrome P450 2B4 F429H Mutant with an Axial Thiolate-Histidine Hydrogen Bond., Yang Y, Zhang H, Usharani D, Bu W, Im S, Tarasev M, Rwere F, Pearl NM, Meagher J, Sun C, Stuckey J, Shaik S, Waskell L, Biochemistry. 2014 Jul 31. PMID: 25029089

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