And we'll talk about the mechanism of this enzyme and what this actually does in the next lecture. But basically what the transketulase actually does, it takes a two carbon group from the zelulose. It takes this entire section, places it onto the ribbon. So notice both of these are pento sugars, five carbon sugars. And when we transfer this section onto this molecule, we basically form, we extend that sugar by two carbons and we form a seven carbon sugar known as CETO heptolose seven phosphates. Now, if we take away these two carbons from the cellulose, we essentially form a trios, a three carbon sugar.