Molecular Breeding of Advanced Microorganisms for Biofuel Production

Figure 5

The metabolic pathways of C. acetobutylicum. Numbers refer to the enzymes: 1: acetyl-CoA acetyltransferase (thiolase; THL), 2: β-hydroxybutyryl-CoA dehydrogenase (HBD), 3: 3-hydroxybutyryl-CoA dehydratase (crotonase; CRT), 4: butyryl-CoA dehydrogenase (BCD), electron transfer flavoprotein A (ETFA) and B (ETFB), 5: aldehyde dehydrogenase (ADHE)/aldehyde-alcohol dehydrogenase (ADHE1).