In the process, we hydrolyze an ATP by using water to basically drive the synthesis of this molecule in this general direction. So when we have plenty of ATP molecules inside our body, because if our energy value is low we have a relatively high concentration of ATP, under these conditions the oxyloacetate will be transformed into a variety of products. Why? Well, because we're not going to need to use the oxyloacetate to actually generate those NADH molecules, to use the NADH molecules to produce ATP via the electron transport chain. And so instead of using the oxylacetate to produce ATP, we're going to use the oxalo acetate to generate all these different types of biological molecules such as glucose specific amino acids, pure and bases and pyramididine bases. Now, if we have low energy charge values in a cell, if we have a relatively low amount of ATP in such cases we do want to actually form those ATP molecules, the NADH molecules and in turn the ATP molecules.