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Amino acid sequence alignment of homologous regions in the E. coli acetyl-CoA carboxylase α subunit (EcaccA) and β subunit (EcaccD) of carboxyltransferase, the V. parvula methylmalonyl-CoA decarboxylase α subunit (VpmmdA), the M. xanthus propionyl-CoA carboxylase β subunit (MxpccB), and the M. xanthus acetyl-CoA carboxylase carboxyltransferase subunit (MxaccB).
