Figure 2.

Fermentation of glucose to generate butyrate. Schematic of key metabolic pathways for hydrogen production in Clostridium acetobutylicum. Arrows with larger width indicate a series of reactions. Arrows with narrow width indicate individual reactions. Enzymes: 1, glycolytic enzymes; 2, pyruvate ferredoxin oxidoreductase (E.C.; 3, hydrogenase (E.C.; 4, acetyl-CoA acetyltransferase (thiolase) (E.C.; 5, β-hydroxybutyryl-CoA dehydrogenase (E.C.; 6, crotonase (E.C.; 7, butyryl-CoA dehydrogenase (E.C.; 8, phosphotransbutyrylase (E.C.; 9, butyrate kinase (E.C. Abbreviations: Ferredoxin (Fd); Coenzyme A (CoASH).

Chen et al. BMC Systems Biology 2012 6:40   doi:10.1186/1752-0509-6-40
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