Now, the other reason why this reaction is product favorite is because inside our cells we generally have a much higher concentration of the orthophosphate reactive molecule than the glucose one phosphate product. In fact, the ratio of orthophosphate to this product is about 100 to one. And so because of that, because we have so much more of the reactants, that means that will drive this reaction toward the right side. So this process, step one of glycogen breakdown, proceeds toward the right side, toward the product side. Because the cell contains a higher concentration of orthophosphate compared to glucose one phosphate, and because the formation of glucose one phosphate bypasses the usage of the ATP, it forms directly the glucose one phosphate from that glucose. And this is in fact energetically favorable.