Now, in step one, we basically want to transform the NADH molecule that is produced in a glycolytic pathway into NAD plus. And in this process, we ultimately extract those two high energy electrons and we place them onto oxyloacetate. In the process, we actually reduce oxyloacetate into malate. 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.