The competitive inhibition of the urease-catalyzed hydrolysis of urea by phosphate.

It follows from equation (1) that when l/u is plotted (usually as the ordinate) against l/s a straight line will be obtained with inhibitory action influencing either the slope or the ordinate intercept or both. Thus the type of inhibition may be defined on the basis of the effect of the inhibitory action upon the slope and intercept in the above plot. In the absence of an inhibitor (i = 0) equation (1) reduces to the Michaelis-Menten equation