And so what we do is we take a glucose one phosphate and we transform it into a urine diphosphate glucose, UDP glucose, and the UDP glucose is much more active. And now an enzyme known as glycogen synthase can actually synthesize an Alpha one four glycocitic bond, attach that glucose onto that elongating chain. Now, the thing about glycogen synthase is it cannot simply begin from scratch. It actually requires a primer. And that primer has to be more than four glucose molecules long. So the question that I like to begin in this lecture is what exactly synthesizes that primer that allows the glycogen synthase to begin the elongation process, to begin building that glycogen molecule and creating the Alpha one four glycocity bond.