Table 1.

Molar fractions of GM1 in the inner and outer leaflets, ${\varphi }_{\text{in}}$ and ${\varphi }_{\text{out}}$, and membrane spontaneous curvature

Total mol% GM1	Intensity ratio $I_{\text{after}}/I_{\text{before}}$	GM1 fraction mol%		Asymmetry, $\mathrm{\Delta }\varphi ={\varphi }_{\text{in}}-{\varphi }_{\text{out}}$, mol%	Spontaneous curvature $m^{-1}$, nm
		${\varphi }_{\text{in}}$	${\varphi }_{\text{out}}$		Out-tubes	In-tubes
2	5.19	1.98	0.47	1.51	−510 ± 142	−411 ± 110
4	4.73	3.97	1.07	2.90	−235 ± 45	−213 ± 29