So in step one and two, we produce two ATP molecules. And in this step, we produce two. And so two and two gives us four. And because we used up two in stage one, we have a net amount of two ATP molecules produced when we break down a single glucose molecule. So in the last step of glycolysis, step five of stage three, or step ten of glycolysis, we see that Pyruvate kinase, this enzyme catalyzes the phosphoryl transfer from the high phosphoryl transfer potential phosphorinl Pyruvate molecule onto the ADP. And in the presence of H plus, we form the ENL form of this Pyruvate.