And that decreases the rate of production of this intermediate molecule. And that makes sense because if we have abundant amounts of CTP we do not want to waste energy and produce this intermediate molecule. And so that's exactly why we limit the production of n carbon oil aspartate by controlling the activity of this enzyme alospa. Now, before we actually go into our discussion of the structure of this enzyme, the final thing that I'd like to focus on in this lecture is the fact that aspartate transcarbomolase observes cooperative behavior. So, like most allosteric enzymes, atcase actually exhibits cooperativity. And so what that means is the binding to one side affects the binding affinity of the other sides on that same enzyme.