This step involves the conversion of the alpha ketoglutrate into the succinil coenzy, and this is what the reaction looks like. So this is the net reaction. On the reactant side, we have the product of step three, the alpha key to glutrate in the presence of the mad plus. 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.