Table 2. Area per Lipid in the Membrane of the Liposomes and the Surface Charge Density, Obtained from the SAXS Analysis^a.

membrane	POPC				POPC/POPS 95/5				POPC/POPS 90/10
fE [%]	0b	0.5			0	0.5			0	0.5
leaflet	1, 2	1	2	av	1, 2	1	2	av	1, 2	1	2	av
 [Å2]	64.8	80.0	44.6	62.3	63.7	73.7	52.0	62.8	64.3	72.0	55.8	63.9
ρ 10–3[e/Å2]	0	0	0	0	0.78	0.68	0.96	0.80	1.56	1.39	1.79	1.56

membrane	DPPC				DPPC/DPPS 95/5				DPPC/DPPS 90/10
fE [%]	0b	0.5			0	0.5			0	0.5
leaflet	1, 2	1	2	av	1, 2	1	2	av	1, 2	1	2	av
 [Å2]	45.5	47.6	41.7	44.6	45.1	47.5	41.7	44.6	44.3	46.7	42.0	44.3
ρ 10–3[e/Å2]	0	0	0	0	1.12	1.14	1.15	1.14	2.25	2.36	2.36	2.36

^aThe looser and tighter packed leaflets of the asymmetric membranes are indexed as 1 and 2, respectively. The values averaged over two leaflets are also entered.

^bOwn data published elsewhere.²⁸