1SWV:
reference: Investigation of metal ion binding in phosphonoacetaldehyde hydrolase identifies sequence markers for metal-activated enzymes of the HAD enzyme superfamily., Zhang G, Morais MC, Dai J, Zhang W, Dunaway-Mariano D, Allen KN, Biochemistry 2004 May 4;43(17):4990-7. PMID: 15109258

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