Figure 2. Typical responses of a coronary (left panel) and a renal artery strip (right panel) to pancuronium (10 sup -8 to 10 sup -5 M) before (control) and after treatment with indomethacin (IM, 10 sup -6 M) or tranylcypromine (5 x 10 sup -4 M). The strips were partially contracted with prostaglandin F²alpha. Concentrations of pancuronium from 8 to 5 = 10 sup -8 M, 10 sup -7 M, 10 sup -6 M, 10 sup -5 M, respectively. The horizontal line just left of each tracing represents the level before the addition of prostaglandin F²alpha. PCB, pancuronium; PA, 10 sup -4 M papaverine.