So why did that Amp and not ADP is that regulatory activator molecule for phosphor fructokinase? Well, because something actually happens when we have a very low concentration of ATP inside our cells. Instead of using glycolysis, our cell does something else. So to basically be able to quickly produce the ATP molecules that are needed by the cell to basically contract those skeleton muscle tissue this is a process that takes place and it's catalyzed by adenylive kinase. So adenyolyt kinase takes two ATP molecules. Two adenosine diphosphate molecules transfers one phosphoryl group from this onto the other molecule that produces very quickly an ATP molecule and an Amp molecule.