So we see that as low concentrations of the citadine triphosphate in our cells there is not enough CTP to actually bind onto the atcase. And so the activity of atcase will be high and the rate of production of the N carbon oil aspartate will also be high. And this is shown in the following curve. At low concentrations of CTP somewhere here, the rate of production will be high somewhere here. But as we increase the concentration of CTP, the rate will drop. And that's because now we have ample amount of CTP and some of them will go back and bind onto this enzyme, basically inhibit that enzyme.