But what we do is we couple that process with the hydrolysis of ATP into ATP and pi orthophosphate. And because the hydrolysis of ATP is a highly exergonic process, we use that free energy to basically couple the endergonic process of carboxylating, that Pyruvate molecule. So together, this process, the coupling of these two processes, the hydrolysis of ATP and the carboxylation of Pyruvate, actually creates a relatively favorable process. Now let's talk about this enzyme. So we essentially have a CO2 molecule that is attached onto the Pyruvate to form the oxyloacetate. In the process, we hydrolyzed the ATP into orthophosphen ATP and we also form two H plus ions.