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. And this is primarily because unlike in skeleton muscle cells, liver cells do not actually experience a change in the energy charge of the cell. So we see that the energy charge inside liver cells remains relatively constant. And what that means is amp molecules do not actually affect phosphorase B.