Fig. 3. Changes in proton secretion rate of trout hepatocytes following addition
(at the time indicated by the arrow) of 0.5 µmol l–1
ionomycin, 0.1 µmol l–1 thapsigargin or hypertonic medium
(1.6x isosmolarity). Data are means ± s.e.m. from three
independent preparations.