So for example, if we move back to this molecule, the glucose six phosphate, the glucose six phosphate does not necessarily have to actually go on to produce the fructose 116 biphosphate. If we have plenty amounts of energy inside the cell, the glucose six phosphate can then be stored as glycogen. Now, if we don't have that much energy in a cell, then the glucose six phosphate will go on to form the fructose six phosphate, which will go on to form the fructose one six biphosphate. But once this step takes place, that glucose is fully committed to Aragly Colesis pathway. That is, there is no turning back. So once we form the high energy fructose 116 biphosphate, we move on to stage two.