A Modified Standard State for Biochemical Applications
MATHEMATICAL All the organophosphate compounds listed in Table 15.1 undergo hydrolysis reactions in the same way as ATP. The following equation illustrates the situation for glucose-1-phosphate.
Glucose-1-phosphate + H2O → Glucose + Pi
ΔG°' = −20.9 kJ mol−1
Using the free-energy values in Table 15.1, predict whether the following reactions will proceed in the direction written, and calculate the ΔG°' for the reaction, assuming that the reactants are initially present in a 1:1 molar ratio.
(a) ATP 1 Creatine → Creatine phosphate 1 ADP
(b) ATP 1 Glycerol → Glycerol-3-phosphate + ADP
(c) ATP 1 Pyruvate → Phosphoenolpyruvate + ADP
(d) ATP 1 Glucose → Glucose-6-phosphate + ADP
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