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. 2016 Jul 25;3:19–25. doi: 10.1016/j.biopen.2016.07.003

Fig. 1.

Fig. 1

Citric acid cycle and NAD+-dependent IDH action. (A) The rate-limiting step of the citric acid cycle catalyzed by isocitrate dehydrogenase, is one of the irreversible reactions in the citric acid cycle due to its large –ΔG (negative free energy change) (B) The two-step process of isocitrate dehydrogenase action.