FIGURE 3.

Voltage-activated outward K⁺ currents in HeLa cells and Kv2.1 current in CHO cells blocked by TEA. A, the whole-cell patch clamp was applied in recording HeLa cells of voltage-gated outward K⁺ currents. The current-voltage relation of K⁺ current was set up by depolarizing from −40 to 60 mV with 10-mV increment of each pulse. These outward K⁺ currents in the same cell were inhibited by external TEA (10 mm). B, the whole-cell patch clamp was applied in recording one CHO_kv2.1 cell of Kv2.1 current. These Kv2.1 currents in the same cells were inhibited by external TEA (10 mm). All values are represented as the means ± S.D. of seven independent experiments.