The ΔG' of ATP hydrolysis is highly affected by Mg2+ ions.
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ATP(aq) + H2O(l) ⇌ ADP(aq) + Phosphate(aq)
Reaction Gibbs Energy
Estimated ΔrG'm -46.8 ± 0.6 [kJ/mol]
Estimated ΔrG'° -29.6 ± 0.6 [kJ/mol]     K'eq = 1.6 × 105
Catalyzed by
Cd2+-exporting ATPase  [EC 3.6.3.3]
Mg2+-importing ATPase  [EC 3.6.3.2]
pH
pMg
Ionic strength M
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