So we have the Y axis is the rate of formation of the M carbon oil aspartate and the x axis is the concentration of this final product in this reaction here, the CTP, the citadine triphosphate. So what this curve basically shows us, what the blue curve tells us is when inside our cells we have a low concentration of citadine triphosphate, the rate of formation of this intermediate will be relatively high. And so what that implies is the activity of the atcase that aspartate transcarbomolase will also be high. But as we increase the concentration of CTP, as we produce more and more CTP and in fact, once our cells concentration of CTP is plantful, we're going to see that somewhere here. If we look at the rate of formation of this molecule, it will be much lower than in this particular case. And so what that implies is as the concentration of CTP increases, it somehow goes back to this reaction here and affects the activity of this atcase because ultimately it's the atcase that controls the rate of this reaction of the production of this intermediate and carbon oil aspartate.