So we mix up with the ATP because this will accept this group here. And so once the process takes place, we essentially form an ATP molecule and we form a three phosphaglycerate. Now, what happens with the three phosphoglycerate? 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.