So in this lecture, we have to understand two important things. Number one is glycogen synthesis is simply not the reverse process of glycogen breakdown. They follow completely different pathways in the same way that gluconeogenesis is not simply the reverse of glycolysis. And the second thing we have to understand is glucose one phosphate. So the glucose molecule that we ultimately want to actually add onto that growing glycogen chain is not reactive enough to actually attach onto it. What we have to do is we have to first activate it.