146 8 Mechanisms and Inhibitors 6. Mode of inhibition. The kinetics of an enzyme are mea- sured as a function of substrate concentration in the pres- ence and in the absence of 2 μM inhibitor. [S] (μM) 6 Velocity (μmol minute¹) 35082 10 No inhibitor Inhibitor 10.4 4.1 14.5 6.4 22.5 11.3 33.8 22.6 40.5 33.8 90 (a) What are the values of Vmax and Ky in the absence of inhibitor? In its presence? (b) What type of inhibition is it?