So if some type of signal transduction pathway takes place that increases the concentration of cyclic Amp within our cell that in turn stimulates PKA. And one of the target proteins of PKA is glycogen synthase A. So upon the stimulation of PKA that essentially promotes the transformation of glycogen synthase A into glycogen synthase B. In addition, we also have this other kinase the glycogen synthase kinase that also stimulates the transformation of glycogen synthase A into glycogen synthase B. Now, once we go from this enzyme to this enzyme this enzyme exists predominantly in the inactive form. And what that means is glycogen synthesis will not take place when the enzyme is in this particular form.