Fig. 3.

Nifedipine reduces barium currents in B21. A1: barium currents in the absence of nifedipine (Control). B21 was held at −50 mV, and inward currents were induced by 150-ms steps to 40 mV (with 10-mV increments). A2: currents induced as in A1 but in the presence of 10 μM nifedipine. A3: at the conclusion of experiments, currents were induced in 2 mM Cd²⁺, a nonspecific Ca²⁺ channel blocker in Aplysia. B: group data for the experiments shown in A1–A3 (n = 7).