And this is what I'd like to focus on in this lecture. So let's begin by describing what the general goal is of stage two. So in stage two, the entire point is to take that highly reactive fructose one six bits phosphate molecule that was formed in stage one and to break it down and form two identical three carbon molecules we call glyceroaldehyde three phosphates or gap gap molecules. 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.