1RQL:
reference: X-ray crystallographic and site-directed mutagenesis analysis of the mechanism of Schiff-base formation in phosphonoacetaldehyde hydrolase catalysis., Morais MC, Zhang G, Zhang W, Olsen DB, Dunaway-Mariano D, Allen KN, J Biol Chem 2004 Mar 5;279(10):9353-61. Epub 2003 Dec 10. PMID: 14670958

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