Thermodynamics of Glycolysis Hydrolysis
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In glycolysis, the hydrolysis of phosphoenol pyruvate is thermodynamically driven by the highly exergonic enol-to-keto conversion of pyruvate. From the two half reactions shown below, what is the G° (kJ/mol) of the overall reaction?
Half reactions:
I. phosphoenol pyruvate + H2O → enol pyruvate + HPO42- G° = -16 kJ/mol
II. keto pyruvate → enol pyruvate G° = 49.5 kJ/mol
Overall reaction: phosphoenolpyruvate + H2O → keto pyruvate + HPO42-
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Solution Summary
The hydrolysis of phosphoenol pyruvate being thermodynamically driven is examined.
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SOLUTION:
Reverse equation II (change the sign of its G0). Then add the two equations. The ...
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