And that free energy that is released when we cleave this bond is basically used to drive the attachment of this molecule onto the GDP to form the GTP. In the process we also release that coenzyme A and form this four carbon succinate molecule that will go on to react in step six of the citric acid cycle. And this reaction is catalyzed by succinct coenzyme asynthetase. Now, once we form the GTP molecule, the GTP is generally used for two purposes. They can either be used by g proteins for instance, we saw that in signal transduction pathways we have g proteins and the g proteins utilize the GTP molecule and so we can use it for that specific purpose or the GTP can actually be transformed into ATP. How?