Table 1. Effects of δ/ω-PLTX-Pt1a (20 nM) on the voltage-dependent Na⁺ currents.

	Vth (mV)a	Vh (mV)b	Ip (nA)c	Iss (nA)c	Ip/Iss	♦ (ms)d	r (%)e
Before	−38.6±9.0	−45.5±7.6	−1.43±0.64	−0.15±0.12	25.9±25.1	1.84±0.34	0.76±0.06
After	−45.7±9.7*	−50.0±5.4	−1.18±0.66	−0.22±0.15	9.2±9.4	3.44±1.58**	0.79±0.08
	n = 7	n = 4	n = 7	n = 7	n = 6	n = 14	n = 4

Results are shown as Mean±SD. * p<0.01. **p<0.002. (Paired student's t-test).

a. V_th is the threshold membrane potential at which the amplitude of inward Na⁺ current is larger than 50 pA which can be confidently distinguished from the noise level;

b. V_h is the membrane potential of half-inactivation;

c. I_p and I_ss are the amplitudes of peak and steady-state Na⁺ currents respectively;

d. ♦is the decay rate of the inactivating Na⁺ current evoked by depolarizing pulse to −20 mV from the holding potential of −80 mV. The value was obtained by single exponential fitting of the current decay phase. In 2 of the 14 cells, currents were better fitted with a double-exponential function, of which ♦₁ was shown here.

e. r is the fractional recovery from inactivation of Na⁺ currents at −10 mV, assessed by the double pulse paradigm with an interpulse interval of 500 ms.