So aldelase is the enzyme that catalyzes the breakdown of that fructose one six bisphosphate into two different three carbon molecules. And let's see exactly what these molecules are and what they look like. So let's begin with that fructose one six bisphosphate in its cyclic form that is formed in stage one. So once we form this, then that aldelase moves into this area. Now, before the aldelase can actually catalyze this reaction, this cyclic fructose must be transformed into its open chain counterpart. And that's because this is the form that will allow the aldeways to actually get to this bond and cleave that bond.