We need this because this acts as the carrier to actually abstract those electrons. And we have the Co enzyme, the coenzyme A COA. And on the product side, we essentially attach we remove this component that produces the carbon dioxide, and we attach the coenzyme a onto this bond to form the high energy thio ester bond. And this is the bond that will be broken in the steps to come as we'll discuss in the next several electrodes. Now, this succinct coenzyme A basically is the product of step four. And the enzyme that catalyzes step four is known as alpha ketoglu rate because this is a substrate molecule that binds into the enzyme dehydrogenase complex.