Well, in the next step, in step eight, we basically want to transform the three phosphorylycerate into a less stable molecule. So we want to take this and destabilize it and that will make it more reactive so that in step nine it can actually react. So to destabilize this, the goal is we want to take this phosphate and bring it closer to this negative charge. So we have a negative charge of negative one and a charge of negative two. And if we basically decrease the distance between the negative charge, that will destabilize this molecule. And so we have an enzyme known as phosphoglycerate mutates.