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. So to summarize, let's take a look at the following two diagrams. So if we have low blood glucose levels, what will begin to happen is these glucose will essentially depart from these regulatory sites and that will shift the equilibrium toward the r state. It will activate phosphorase A of the liver and that will initiate glycogen breakdown.