We're going to have too many ATP molecules. And so what that means is we don't want to produce any more ATP molecules. We have plenty of ATP molecules to go around and so phosphorutokinase will be inhibited by that large concentration of ATP and ATP acts as an allosteric inhibitor. On the other hand, if we don't have many ATP molecules in a cell then we have a low energy charge value, so low ratio and we have many more amp molecules and they will bind onto the phosphorptokinase and essentially activate them. They will make them much more likely to actually convert the fructosex phosphate into the fructose one six biphosphate bisphosphate. So basically the takeaway lesson here is the same two alystaric molecules that are used by skeleton muscle cells to control phosphorinase is also used by liver cells.