Table 1.

Physical properties of the vaccine formulations

Formulation	Particle size (nm)*	Zeta potential (mV)**	Encapsulation efficiency (%)***
R-DOTAP/E7	126.8 ± 5.1	54.3 ± 4.0	31.3 ± 16.6
S-DOTAP/E7	125.6 ± 7.8	55.8 ± 1.9	32.1 ± 8.9

Lipid concentration used in these studies was 6 mM, equivalent to 300 nmol of lipid per mouse

* P = 0.69, n = 8–10

** P = 0.37, n = 8–10

*** P = 0.87, n = 13–14