Coupling of Production and Use of Energy
MATHEMATICAL The standard free-energy change for the reaction
Arginine + ATP → Phosphoarginine + ADP
is +1.7 kJ mol−1. From this information and that in Table, calculate the ΔG°' for the reaction
Phosphoarginine + H2O → Arginine + Pi
Table Free Energies of Hydrolysis of Selected Organophosphates
Compound | ΔG°' | |
kJ mol−1 | kcal mol−1 | |
Phosphoenolpyruvate | −61.9 | −14.8 |
Carbamoyl phosphate | −51.4 | −12.3 |
Creatine phosphate | −43.1 | −10.3 |
Acetyl phosphate | −42.2 | −10.1 |
ATP (to ADP) | −30.5 | −7.3 |
Glucose-1-phosphate | −20.9 | −5.0 |
Glucose-6-phosphate | −12.5 | −3.0 |
Glycerol-3-phosphate | −9.7 | −2.3 |
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