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Reaction, Control Point and Citric Acid Cycle

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The dG' for the fumerase reaction is -3.4kJ/mol, but Δ G' is near 0. What is the ratio of fumarate to malate under cellular conditions at 37.0C?

Is this reaction likely to be a control point in the citric acid cycle?

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Since dG' is near zero, this indicates that the reaction is near equilibrium, since dG' = 0 at equilibrium.

If we assume, that dG' = 0, then we can simplify the question.

At equilibrium, ...

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