Now, let's go back to step four in a moment, for a moment, because we didn't mention the enzyme that catalyzes this step. So we have the substrate molecule is alpha ketoglutrate, and the enzyme is basically a dehydrogenase complex. So alpha ketoglutterate, dehydrogenase complex. And it's a complex because we actually have three different enzymes involved in this process. And this complex is very similar to the complex that we spoke about in our discussion on Pyruvate decorboxylation. So once we form this molecule, this molecule that contains the high energy thioester bond is known as succinct coenzyme a.