And in the cytoplasm, if you remember back to regulation of glycolysis, the citrate actually inhibits a specific type of enzyme in glycolysis, which inhibits the rate at which glycolysis decreases the rate at which glycolysis actually takes place. And the citrate can actually be used to form fat molecules, as we'll discuss in the future lecture. Now, let's move on to step four. Step four is the second oxidative decarboxylation step of the citric acid cycle. And this is catalyzed by alpha ketoglutrade dehydrogenase, also an allosteric enzyme. So remember back to our discussion that this is actually step four.