So on the first position and the third position. And that's why this molecule is essentially a molecule that has a higher potential to actually transfer that phosphoryl group. And so now in the next step, we can use one three BPG, the same molecule to basically transfer that phosphoryl group onto an ADP molecule, thereby producing an ATP and the molecule that catalyzes this, well, again, it must be a kinase. Why? Well, because this is a phosphorylation reaction. And so we use our phosphoglycerate kinase phosphoglycerate because this is a one three bisphosphoglycerate.