And there is no turning back for this molecule once it's committed, it has to carry out the process of glycolysis. So that is why this enzyme is the most important regulation site in our cells in the process of glycolysis. It catalyzes that commitment step. Now, if we study the structure phosphor fructokinates, we're going to find catalytic regions and regulatory regions. The catalytic regions basically contain the active side that binds the substrate fructosex phosphate. But those regulatory domains contain the sites that an allosteric molecule or molecules can actually bind to.