Consider the malate dehydrogenase reaction, part of tricarboxylic acid cycle, shown below. malate + NAD+ oxaloacetate + NADH + H+ ΔGo ’ = 29.7 kJ/mol. It has been reported that the concentrations of NAD+ and NADH in yeast mitochondria were 20 mM and 0.3 mM, respectively. If we performed similar measurements and also determined that the concentration of malate in yeast mitochondria was 0.5 mM and that of oxaloacetate was 0.1 µM at pH 7.0 at 37˚C, use this information to calculate the equilibrium constant for the given reaction.

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