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Energetics of the triose phosphate isomerase reaction(Integrates with Chapter 3.) Triose p...

Energetics of the triose phosphate isomerase reaction

(Integrates with Chapter 3.) Triose phosphate isomerase catalyzes the conversion of dihydroxyacetone-P to glyceraldehyde-3-P. The standard free energy change, ΔGº’, for this reaction is +7.6 kJ/mol. However, the observed free energy change (ΔG) for this reaction in erythrocytes is + 2.4 kJ/mol.

a. Calculate the ratio of [dihydroxyacetone-P]/[glyceraldehyde-3-P] in erythrocytes from ΔG.


b. If [dihydroxyacetone-P] = 0.2 mM, what is [glyceraldehyde-3-P]?

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Solutions For Problems in Chapter 18