Table 1.
Stoichiometric production and utilization of metabolic [2H] during synthesis of major end products of fermentation.
| End product | Stoichiometry equation | [2H] balance∗ |
|---|---|---|
| Acetate (CH3COOH) | C6H12O6+2H2O1 ⟶ 2CH3COOH+4[2H]+2CO2 | +2 |
| Propionate (CH3CH2COOH) | C6H12O6+2[2H] ⟶ 2CH3CH2COOH+2H2O | -1 |
| Butyrate (CH3(CH2)2COOH) | C6H12O6 ⟶ CH3(CH2)2COOH+2[2H]+2CO2 | +2 |
| Valerate (CH3(CH2)3COOH) | C6H12O6 +[2H] ⟶ CH3(CH2)3COOH+CO2+2H2O | -1 |
| Caproatea (CH3(CH2)4COOH) | C6H12O6+4[2H] ⟶ CH3(CH2)4COOH+4H2O | -4 |
| Caproateb (CH3(CH2)4COOH) | 3C6H12O6 ⟶ 2CH3(CH2)4COOH+4[2H]+2H2O+6CO2 | +2 |
| Methane (CH4) | CO2+4[2H] ⟶ CH4+2H2O | -4 |
aPropanyl-CoA as intermediate. bAcetyl-CoA as intermediate. ∗Moles [2H] utilized or produced per mole of the fermentation end product.