reference: Arginine 60 in the ArsC arsenate reductase of E. coli plasmid R773 determines the chemical nature of the bound As(III) product., DeMel S, Shi J, Martin P, Rosen BP, Edwards BF, Protein Sci 2004 Sep;13(9):2330-40. Epub 2004 Aug 04. PMID: 15295115

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