3IXM:
reference: Structural Basis for Inverting the Enantioselectivity of Arylmalonate Decarboxylase Revealed by the Structural Analysis of the Gly74Cys/Cys188Ser Mutant in the Liganded Form., Obata R, Nakasako M, Biochemistry. 2010 Feb 16. PMID: 20136121

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