Representative of the conductance–voltage activation curves constructed for all cells. (A) The representative activation curve for the peak outward current. (B) The representative activation curve for the steady outward current. The Boltzmann function was fitted to the activation curves revealing a mean half-activation (V_1/2) and slope factor. The slope factors are quoted in the results section, along with the values for V_1/2. Insets show representative currents evoked at +40 mV depolarizing step for control (filled square), TEA (open square) and wash (open circle).