TABLE 2.

Sterols ordering effect

	Smol		Tilt (°)		No. gauche		Lifetime (ps) trans/gauche
Membrane	β-chain	γ-chain	β-chain	γ-chain	β-chain	γ-chain	β-chain	γ-chain
DMPC	0.30 ± 0.01	0.31 ± 0.01	27 ± 0.5	28 ± 0.5	2.4 ± 0.1	2.4 ± 0.1	180 ± 4/55 ± 2	190 ± 4/55 ± 2
DMPC-Chol	0.45 ± 0.01	0.40 ± 0.01	20 ± 0.5	22 ± 0.5	2.3 ± 0.1	2.2 ± 0.1	215 ± 4/60 ± 2	230 ± 4/60 ± 2
Chol			17† ± 2
DMPC-Echol	0.32 ± 0.01	0.34 ± 0.01	27 ± 0.5	25 ± 0.5	2.4 ± 0.1	2.2 ± 0.1	180 ± 4/60 ± 2	185 ± 6/60 ± 2
Echol			16† ± 2

Average (over segments and torsion angles 4–14, see text) values of the molecular order parameter, S_mol, chain tilt angle, number of gauche/alkyl chain, and lifetimes of trans and gauche conformations, for the β- and γ-chain in DMPC,^* DMPC-Chol,^* and DMPC-Echol bilayers. Errors are given in standard errors.

^*From Róg and Pasenkiewicz-Gierula (2001a).

^†Tilt of the sterol ring.