TABLE 3.

Kinetic and thermodynamic parameters for the permeability of dithionite, at 35°C, through the lipid bilayers tested

Lipid bilayer composition	P (m s−1) × 1014	k (s−1) × 105	ΔGo‡ (kJ/mol)*	ΔHo‡ (kJ/mol)	TΔSo‡ (kJ/mol)
POPC	3.2 ± 0.9	8 ± 2	99.6 ± 0.7	95 ± 5	−4.5 ± 0.3
POPC/Chol (1:1)	1.7 ± 0.4	4.3 ± 0.9	101.3 ± 0.5	105 ± 3	3.9 ± 0.1
SpM/Chol (6:4)	0.17 ± 0.12	0.4 ± 0.3	107 ± 2	148 ± 10	41 ± 5

^*Standard deviations calculated from the standard deviations found experimentally for the permeability rate constant, k, at 35°C.