And so to have this symmetry in which the two products have the same number of carbons, that's why in stage one, we have to transform that glucose into its isomer fructose. Now, let's take a look at these two products. Notice that one of these products is that product that we want to form in stage two. It's the glyceroaldehyde three phosphate. Now, glyceroaldehyde three phosphate actually lies directly on the pathway of glycolysis. And what that means is, once we form the gap molecule, it can go on directly into stage three without actually being modified in any way.