Now, in the presence of an enzyme known as glycogen synthase, what happens is we essentially take the glucose molecule, this structure here, and we attach it onto this region here. More specifically, if we examine the terminal glucose residue that contains a free hydroxyl group on the fourth carbon, this essentially acts as a nucleophile. It attacks this carbon here of the glucose, and it establishes it creates an alpha one four glycositic bond and it displaces, it kicks off this entire molecule here. So this is what we form after this step. So the hydroxyl group on the fourth carbon. So if we actually label our carbons, so let's say this is carbon one, carbon two, carbon three, carbon four, carbon five, and carbon six.