Figure 2: Dose-response curves for competitive antagonism of a full agonist A by a partial agonist B for given doses of B. For the given dose of the latter, the combined response of A and B, R(A+B), is shown relative to the response of B alone, R(0,B). The scaling factor eA R(0,B) is also indicated which, for the maximum response of B, may be written eA (1 - eB/eA).