
Fig. 3. Power density spectra obtained with split gill lamellae (A,B) or isolated gill cuticles (C,D) at different external amiloride concentrations (A,C; at a clamp voltage of 50 mV) and clamp voltages (B,D, at 5 µmol l1 external amiloride) as indicated in the insets. Sf, power density; f, frequency.