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. 2001 Feb;183(4):1499–1503. doi: 10.1128/JB.183.4.1499-1503.2001

FIG. 1.

FIG. 1

Reaction mechanism of E. coli ACC. Biotin carboxylase is encoded by the accC gene, whereas BCCP is encoded by the accB gene. The two subunits involved in carboxyltransferase activity are encoded by the accA and accD genes. The covalently bound biotin of BCCP carries the carboxylate moiety.