1FEZ:
reference: The crystal structure of bacillus cereus phosphonoacetaldehyde hydrolase: insight into catalysis of phosphorus bond cleavage and catalytic diversification within the HAD enzyme superfamily., Morais MC, Zhang W, Baker AS, Zhang G, Dunaway-Mariano D, Allen KN, Biochemistry 2000 Aug 29;39(34):10385-96. PMID: 10956028

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