TABLE 2.
Stoichiometry and free energy of reactions related to the metabolism of S. oneidensis strain MR-1 with various electron acceptors
| Equation | Reactants | Products | Std G′a
|
|
|---|---|---|---|---|
| kJ/reaction | kJ/mol of e− | |||
| 1b | 1.47[smectite]c + CH3CHOHCOO− + 2H2O | 1.47[smectite]−2.73 + CH3COO− + HCO3− + 5H+ | −436.09 | −109.02 |
| 2 | 12 Fe(OH)3 + CH3CHOHCOO− | 4Fe3O4 + CH3COO− + HCO3− + H+ + 18H2O | −409.70 | −102.42 |
| 3 | 4Fe3+ + CH3CHOHCOO− + 2H2O | 4Fe2+ + CH3COO− + HCO3− + 5H+ | −460.34 | −115.08 |
| 4 | O2 + CH3CHOHCOO− | CH3COO− + HCO3− + H+ | −478.28 | −478.28 |
a
Free energy calculated from the standard free energies of formation of the products and reactants (44, 49) and by assuming standard conditions except for pH 7.
b
Free energy of formation for smectite was calculated from the standard reduction potential estimated by Amonette (2).
c
The chemical formula for smectite used in the calculations was Na0.81(Si7.3Al0.7)(Al1.06Fe2.73IIIMg0.26)O20(OH)4 (79).