5D2F:
reference: Crystal Structures of Apo and Liganded 4-Oxalocrotonate Decarboxylase Uncover a Structural Basis for the Metal-Assisted Decarboxylation of a Vinylogous beta-Keto Acid., Guimaraes SL, Coitinho JB, Costa DM, Araujo SS, Whitman CP, Nagem RA, Biochemistry. 2016 Apr 27. PMID: 27082660

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