Table 3.

Intracellular concentrations of substance involved in catabolic reactions

Substance	Concentration, mol L−1
Fixed values
H+ ions	1.0 × 10−7 [64]
NH4+ ions	1.0 × 10−1 [79]a
Ethanol	9.8 × 10−1
Ranges of valuesb
CO	1 × 10−8–1 × 10−3
H2	1 × 10−8–1 × 10−3
CO2	1 × 10−6–1 × 10−1

^aDefined from a 0.1 M ionic strength

^bRanges of dissolved gas concentrations were defined based on the corresponding range of partial pressures between 1 × 10⁻⁵ to 1 atm