Fig. 2.

Ba²⁺ permeability of two types of inward currents in ICC. A. Representative current traces recorded with 10 mM Ca²⁺ or 10 mM Ba²⁺, respectively. Steps were applied to −40,−20, 0, and 20 mV from a holding of −80 mV in 10 mM Ca²⁺ (black lines) or 10 mM Ba²⁺ (red lines). B. current-voltage relationships for peak current (means ± SE) in 2 mM Ca²⁺ (△), 10 mM Ca²⁺ (○), and 10 mM Ba²⁺ (●). C: currents were obtained by ramp depolarization from −80 to +80 mV in 2 mM Ca²⁺, 10 mM Ca²⁺, and 10 mM Ba²⁺.