Figure 4
Effect of F1 on CaCl 2 -induced contraction in Ca 2+ -free solution containing high K + (60 mM). Concentration-response curves for CaCl2 were determined in aortic rings in the absence and presence of F1 (2 or 4 mg/ml). Values are mean ± S.E.M. (n = 6). *P < 0.05 and **P < 0.01 compared with control (without F1).