And it's phosphorase A that is responsible for actually initiating the process of glycogen breakdown. So this allows, let's say, the liver cell to actually break down the glycogen into glucose molecules and then release the glucose into the blood plasma to help regulate the concentration of glucose in our blood during times of fasting or exercise. At the same exact time, the PKA also actually phosphorylates glycogen synthase A and that transforms it into the act from the active form into the inactive form, glycogen synthase B. Remember, it's glycogen synthase that initiates the elongation of glycogen. It builds the glycogen molecules. And so by inactivating this molecule, we stop glycogen synthesis from actually taking place.