Now, the reason that we actually want to transform the oxyloacetate into malate is because, firstly, the oxyloacetate cannot actually move across the mitochondrial membrane. And secondly, we want to take those electrons from the NADH produced in a glycolytic pathway and transport them onto a molecule that can in fact move across the mitochondrial membrane, the outer and the inner mitochondrial membrane. So once we actually form the malate, the malate now contains the high energy electrons that were stored on the NADH. And the malate can now move across a special antiported transport system found on the inner membrane of the mitochondria. And as the malate moves into the matrix of the mitochondria, an alpha ketoglutrate is exchanged for that malate and it moves into the intermembrane space and then the cytoplasm of that particular cell. So in step one, the NADH that is produced in glycolysis is used to reduce oxyloacetate into malate.