So the VMAX is the maximum velocity of that enzyme. It's the maximum rate at which the enzyme can operate. And to obtain the maximum rate, all the active sides on all the enzymes have to be occupied with the substrate. And what that means is the V max. So this Y value here is equal to so if we use this equation, K two multiplied by well, what has to be the concentration of this for this to be the VMAX? Well, when the enzyme substrate complex.