Well, upon the binding of CTP to the red regulatory chains, what it does is it stabilizes the T state of that enzyme. So it lowers the energy of that T state, it makes it more stable. So as these brown CTP molecules bind onto each one of these regulatory chains, as shown here, it stabilizes the energy of this T state, makes it much more stable, and that shifts the equilibrium from the R state into the T state. And so what that means is when CTP actually binds onto the regulatory chains, these CTP molecules make it more difficult for the substrate to actually bind onto the active sides and transform this coronary structure from the T state into the R state. And so in this manner, our cells use these CTP molecules to actually regulate the behavior of this enzyme. So when we have a high concentration of CTP, we don't want to produce any more CTP.