So in step two, once we form the malate in the cytoplasm of our cell, the malate then moves into the intermembrane space via the outer membrane of the mitochondria. And then that malate enters the matrix of the mitochondria via a special antiporter transport protein in exchange for an alpha key to gluterate. And in step three, we actually take the high energy electrons on the malate that initially came from NADH, and we place them onto that NAD plus coenzyme to actually form the NADH. So in a way, we actually see that the NADH is transported into the matrix of the mitochondria, and we also form we reform the oxalo acetate. Now, once the oxyloacetate oh, and by the way, the enzyme that catalyzes this step, the conversion of malade into oxalo acetate, is known as the mitochondrial malade dehydrogenase. And this is the same enzyme that is used by the citric acid cycle.