And then we take that phosphate and we add it onto this carbon. So the entire step of, the entire purpose of step six is to basically reduce our NAD and oxidize this PGAL. And so basically we add a second phosphate group and we create a destabilized molecule. Now this one three biphosoglycerate is also known as one three BPG. And then we take the one three BPG and we actually mix it with ADP as well as an enzyme known as phosphaglycerate kinase. And we transfer this phosphate group onto the ADP to produce our first ATP molecule as well as the three phosphorglycerate which also contains this phosphate group.