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Representative whole-cell barium (10 mm) currents elicited by 320 ms voltage steps from -80 to +10 mV are shown. NPPB (100 μm; A) and IAA-94 (200 μm; B) reversibly depressed inward barium currents by 79.1 ± 1.7 and 39.8 ± 7.0 %, respectively (means ± s.e.m., n = 6). Zero current was measured at the end of the experiment in the presence of 2 mm Co2+. The peak inward current was measured and plotted against time.
