Calculate the standard reduction potential, Eo, for the following half reaction
isocitrate ----> oxalosuccinate + 2e- + 2 H+,
given that Go = 5.02 kcal/mol for the complete reaction catalyzed by isocitrate dehydrogenase and that Go = 4.71 kcal/mol for the nonoxidative decarboxylation of oxalosuccinate, oxalosuccinate + H+ ----> CO2 + a-ketoglutartate.