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. Now, once we form the oxalo acetate, the problem with the oxyloacetate is it can simply pass across the inner membrane of the mitochondria. We have to transform the oxalo acetate first into aspartate before it can actually move across this special antiporter protein system. And so the process by which we transform the oxyloacetate into aspartate is known as transamination.