Table 2. Average diameter (nm) and zeta potential (mV) of Peptide/DNA complexes prepared in 10 mM HEPES buffer-saline (pH 7.4) using a DNA concentration of 10 μg/mL .

Charge ratio (+/-)	Size (nm)	Zeta (mV)
TAT	39 ± 4	19 ± 1.2
TAT/vector 3:1	876 ± 22	14 ± 1.8
TAT/vector 10:1	798 ± 16	16 ± 0.9

The values represent the mean ± SD, n = 3.