Well, if these two molecules activate the activity of phosphorptokinase, we're going to basically create many more fructose one six bisphosphate. And as this molecule builds up in the concentration, it will depend on pyruvate kinase to transform these ultimately into pyruvate. And so to basically make sure we don't have a continual buildup of the fructose one six bisphosphate, it creates a positive feedback loop and the f 15 bisphosphate molecule actually activates that pyruvate kinase and that activates the process of glycolysis. So let's summarize our results. So, when the cell has a low level of ATP relative to Amp, that means it basically has a low energy charge and it has a relatively high amount of Amp. And so what that means is we want to produce more of the ATP and we want to use less of the ATP.