So, once again, step two is a two step process. So we have this dehydration and hydration that is catalyzed by the connotase, which is an iron sulfur protein because it uses the iron sulfur complex to carry out these two reactions. Now, once we form the isocitrate molecule, now this six carbon molecule is ready to undergo the first oxidative decorboxylation step of the citric acid cycle. And this is what happens in step three. So once the isocitrate is formed, it is ready to undergo the first oxidative decorboxylation step. And this reaction is catalyzed by isocytrate dehydrogenase.