So it's basically the number of substrate molecules that can be transformed into the product molecules over some amount of time per single active site, so per enzyme. And because the turnover number is not changed, what that means is the efficiency of that active site in the presence of the inhibitor does not actually change. And this can be seen from this equation. If VMAX does not actually change and the total concentration of that enzyme that is functional does not change, then Kcat also does not change. It remains constant. And so because these two don't change, the turnover number also does not change.