So when this quantity approaches zero, that basically means we have Kcat divided by Kcat, and that gives us one. So the maximum, the highest possible value of this ratio in parentheses is one. And when this is equal to one, then we see that this ratio is simply equal to k one. And so the highest possible value that can be achieved by KCAD divided by Km is equal to k one. And mathematically, this is how we express that. So if we take the limit as k minus one, this approaches zero.