4KCT:
reference: Pyruvate kinases have an intrinsic and conserved decarboxylase activity., Zhong W, Morgan HP, Nowicki MW, McNae IW, Yuan M, Bella J, Michels PA, Fothergill-Gilmore LA, Walkinshaw MD, Biochem J. 2013 Dec 13. PMID: 24328825

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