Fig. 3.

Insignificant rundown of T-current in 30 min.A, The cells were held at −120 mV, and T-current was elicited by the same pulse protocol as that in Figure 2. The peak T-currents obtained at each time point are normalized to the peak T-current of the first sweep in each cell. The mean normalized peak currents from four cells are then plotted against time. There is no significant decrease of the peak T-current in a period of 30 min.B, The decaying phase of the T-current inA is fitted by monoexponential functions, and the decaying time constant is plotted against time. The time constants show no significant change in 30 min.