And so what happens is the Amp goes on and binds onto the regulatory side to phosphor fructoclinates and that stimulates the activity of the enzyme to catalyze this process increase the rate of the process and increase the rate at which the ATP molecules are also being produced by glycolysis. But the question is in the process of glycolysis we only find ATP molecules and ADP molecules. Amp is not found in glycolysis. 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.