We're going to release an H ion and that phosphate. The orthophosphate will basically attack this molecule and bind onto this carbon here. And so now we have these two phosphate groups on this molecule. 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.