And in the rstate the enzyme is fully active and it will bite to glycogen and begin breaking down glycogen into glucose and then the glucose will be removed into the blood plasma. Now remember, in skeleton muscle cells we have phosphorase A and phosphorace B. In liver cells we also have phosphorase A and phosphorase B. But unlike phosphorase A, the liver phosphorase B is not actually sensitive to glucose molecules. In addition, when we discuss skeleton muscle cells, we saw that in skeleton muscle cells, amp adenosine monophosphate is an allosteric activator of phosphorase B. But in liver cells, the phosphorase B of liver cells does not respond to amp molecules.