So by phosphorylating the glycogen synthase kinase these protein kinases basically inactivate the glycogen synthase kinase. Now let's remember what the purpose of glycogen synthase kinase is. So in their active form the glycogen synthase kinase molecules phosphorylate glycogen synthase A and they transform the glycogen synthase A which are the molecules in their active form into glycogen synthase B which exists predominantly in their inactive form. Now remember that glycogen synthase is the molecule that is responsible in the active form to actually create the glycogen molecule. So these glycogen synthase A in their active form stimulate glycogenesis, the production, the synthesis of glycogen molecules from glucose precursors. But if the glycogen synthase kinase is active then it keeps the glycogen synthase in the glycogen synthase B the inactive form and that prevents glycogenesis.