Table 2.

Viscosity and osmolarity parameters for gating currents α_g, β_g, δ_g and p in solutions containing nonelectrolytes of different size

	αg(%)	Corrected αg (%)	βg (l osmol−1)	p (l osmol−1)	αg (%)	δg(l osmol−1)
Glycerol	73.2 ± 4.2	40.2 ± 2.8	0.142 ± 0.006	0.170	36.6 ± 0.9	0.053 ± 0.007
	(68.0 ± 8.5)	(36.2 ± 6.4)	(0.134 ± 0.012)		(33.4 ± 6.9)	(0.049 ± 0.011)
Erythritol	56.2 ± 4.4	36.0 ± 3.7	0.157 ± 0.010	0.246	41.9 ± 0.9	0.034 ± 0.012
	(52.3 ± 7.0)	(32.5 ± 6.1)	(0.147 ± 0.016)		(41.7 ± 1.0)	(0.025 ± 0.017)
Glucose	51.4 ± 2.4	37.9 ± 2.0	0.244 ± 0.008	0.379	36.1 ± 0.5	0.057 ± 0.007
	(48.2 ± 4.8)	(35.0 ± 4.2)	(0.231 ± 0.019)		(36.6 ± 2.3)	(0.044 ± 0.021)
Sucrose	43.4 ± 1.6	3903 ± 1.7	0.374 ± 0.011	0.638	42.0 ± 3.6	0.030 ± 0.018
	(41.5 ± 4.3)	(37.2 ± 4.5)	(0.365 ± 0.026)		(39.2 ± 5.6)	(0.036 ± 0.039)

α_g and β_g were respectively obtained using eqns (2) and (15), which are derived from the independent model described in the previous paper (Kukita, 1997). They were dependent on the nonelectrolyte size. Parameter p (from eqn (16)) indicates the relationship between bulk viscosity and osmolarity (Fig. 4A). Corrected α_g was obtained by fitting data with eqn (2) after the data had been divided by a factor exp(δ_gΔπ) using eqn (8) with δ_g = 0.05 l osmol⁻¹ (the corrected t_g−η⊂η₀ curve in Fig. 3C). α_g and δ_g were obtained by fitting the t_g−π curve in Fig. 4B with eqn (17). These parameters are independent of the non-electrolyte size. Values are given as means ± s.d. The data were averaged between −10 and +40 mV (upper line) or between −40 and +60 mV (in parentheses, lower line) for each non-electrolyte.