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. So in stage two, the second step, the fifth step is to take the dihydroxy acetone phosphate and transform it into the PGAL by using an enzyme known as trio's phosphate, osamrase. So in stage two, we basically do not use any energy and the entire goal is to produce two PGAL molecules. And finally, let's move on to step three, or stage three.