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Flavoenzymes coupling thiol oxidation with decarboxylation: (a) the pantotheinyl cysteine decarboxylase in the coenzyme A biosynthetic pathway effects decarboxylation via reversible redox at the CH2-SH side chain of substrate; (b) maturation of some lantipeptides involves decarboxylation and crosslinking to yield an aminovinyl cysteine unit; (c) four flavoenzymes proposed to catalyze net eight-electron oxidation of a Cys-Cys precursor to holomycin.
