1ZL7:
reference: Insights into metal ion binding in phospholipases A(2): ultra high-resolution crystal structures of an acidic phospholipase A(2) in the Ca(2+) free and bound states., Murakami MT, Gabdoulkhakov A, Genov N, Cintra AC, Betzel C, Arni RK, Biochimie. 2005 Dec 5;. PMID: 16376474

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