Figure 4.

Size and zeta potential of the lipoplexes prepared from the arginine-based cationic liposomes and plasmid (p) DNA at a varying lipid-to-pDNA ratios (w/w). Lipoplexes were prepared and diluted with Dulbecco’s modified Eagle’s medium in the absence (A) a and (C) b and in the presence of serum (B) a and (D) b.

Notes: The differences in size and zeta potential of the lipoplexes observed in the presence and in the absence of serum were statistically significant (P < 0.01). Data are presented as the mean ± standard deviation (n = 5).