And it also generates the final product, glucose one phosphate. And so this phosphoryl group that's attached onto carbon one of the glucose ultimately comes from this enzyme and the enzyme picks up this phosphoryl group shown in blue. Now, once we form glucose one phosphate, in the next step, the glucose one phosphate needs to be activated because by itself, glucose one phosphate cannot simply be added onto the growing glycogen chain because it's not active enough. So we have to make it much more reactive and higher in energy. And what we do is we essentially attach a phosphoryl group as well as a uridine molecule onto this section to form the UDP glucose. So that takes place in this step three.