Figure 5. Effect of thiopental on the delayed outward rectifier potassium current (IK) recorded using the voltage step protocol. (A) A typical example of currents recorded in response to 10-mV voltage steps from -30 to +60 mV at control and after application of 50 micro Meter thiopental in the same cell. The thiopental-blocked currents were obtained by subtracting currents in the presence of thiopental from control currents. The dashed line denotes zero current. (Inset A) Voltage step protocol used in this experiment. (B) A typical example of the current voltage relations in the absence of thiopental (control), in the presence of 50 micro Meter thiopental, and after washout in the same cell.