So we see that this is the only step in the citric acid cycle in which we actually produce a high phosphoryl transfer potential molecule basically our GTP. And that GTP is ultimately transformed into an ATP molecule via an enzymatic reaction. So I label these three steps as stage number two. So, stage number one is the preparation step. We create that molecule that is capable of undergoing the two decarboxylation reactions. In stage two, we basically have the two decarboxylation reactions, and we also have the only reaction that produces the high phosphoryl transfer potential molecule, the GTP.