Table 1.

Geometrical properties of the phospholipids employed in this work

Lipid	Charge	S	a0 (Å2)	lc (Å)	V (Å3)	References
DPhPC	0	Cylindricala S ~1.00	80.5	13.6	1095	[49;51]
DPhPS	−1	Cylindricala S ~1.06	Unknown Calculated ~79b	Unknown 13.6c	Unknown 1095c	[49;51;53;79]
DPhPE	0	Conea S ~1.20	Unknown Calculated ~67b	Unknown 13.6c	Unknown 1095c	[49;51;53;79]
SM (16:0)	0	Truncated Conea S ~0.51	41d	Calculated 21.78e	Calculated 457.8e	[48;52]
PE (in ECTPL)	0	Conef	~52	Unknownf	Unknownf	[49;53;80]
PG (in ECTPL)	−1	Cylindricalf	~66	Unknownf	Unknownf	[49;53;80]
CL (in ECTPL)	−2	Cylindricalf	Unknown	Unknownf	Unknownf	[49;80]

^aThe shapes of DPhPC, DPhPS, DPhPE and SM are estimated by a dimensionless shape parameter, S, given by S= V/a₀l_c [49].

^bLipid surface areas of DPhPC and DPhPS are estimated from [51;53], namely, the lipid surface area of diCnPS and diCnPE is 62 Ų and 52 Ų, respectively [51], which are 22% smaller than those of each DPh-form lipids [53]. a₀ (DPhPS) = 62/(1−0.22) = 79.4 Ų, a₀ (DPhPE) = 52/(1−0.22) = 66.7 Ų

^cThe hydrocarbon lengths and volumes of DPhPS and DPhPC are estimated to be same as DPhPC.

^dThis value is derived from the fully hydrated C16:0 SM at 29 °C.

^eThese values are approximated by the following formula [48]:

$$\begin{array}{l}V~(27.4+26.9\text{n}){Å}^3\\ l_{\text{c}}~(0.154+0.1265\text{n})\times 10Å\end{array}$$

^flc and V of PE, PG and CL are unknown, because these are natural lipids extracted from E. coli. The shapes of these lipids are referred in [49;80].