Fig. 2. Recordings of the effects of 1 µmol l^–1 concanamycin A (A), Na⁺-free (0Na⁺) physiological saline (PS; B) and the combined application of concanamycin A (ConA) and Na⁺-free PS (C) on pH changes induced by 1 µmol l^–1 dopamine (DA). (D) Quantitative analysis of the rates of pH_i recovery in the above experiments and in an experiment in which 1 µmol l^–1 ConA and 50 µmol l^–1 EIPA were applied simultaneously. Values are means ± s.e.m.; the number of experiments is given under each bar; one-way ANOVA, *P<0.05, **P<0.01.