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. In stage two, the entire purpose of stage two is to basically take the high energy molecule and break it down into two, three carbon molecules. So by using an enzyme known as aldalase, so we basically transform the fructose 116 biphosphate into the dihydroxy acetone phosphate, this molecule and the glycerol aldehy three phosphate, also known as PGAL, which looks something like this. Now, in stage three, we actually need to use the PGAL.