1AJA:
reference: Crystallographic analysis of reversible metal binding observed in a mutant (Asp153-->Gly) of Escherichia coli alkaline phosphatase., Dealwis CG, Brennan C, Christianson K, Mandecki W, Abad-Zapatero C, Biochemistry. 1995 Oct 31;34(43):13967-73. PMID: 7577993

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