1BF6:
reference: Biochemical characterization and crystallographic structure of an Escherichia coli protein from the phosphotriesterase gene family., Buchbinder JL, Stephenson RC, Dresser MJ, Pitera JW, Scanlan TS, Fletterick RJ, Biochemistry 1998 Apr 14;37(15):5096-106. PMID: 9548740

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