Now, let's move on to step four. Now, in step four, what we basically want to do is we want to increase the phosphoryl transfer potential of this molecule. And so we ultimately want to transform it into a molecule that will be able to better transfer a phosphoryl group onto an ADP molecule to form an ATP molecule and Pyruvate in step five. So the entire point of step four is to create a molecule with a greater phosphoryl transfer potential. So in the step number four, an enzyme called Nalase converts the two phosphoglycerate that was formed in this step three into a phosphoenyl Pyruvate or Pet. So this is the reaction shown here.