Now, in this stage, there are actually two different processes and so we use two different enzymes. One enzyme is known as aldelase and the other enzyme is known as trio's phosphate IsomerA. So let's begin by focusing on aldos and discuss the reaction that not aldos aldelase, and the reaction that aldolase actually catalyzes. 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.