Size, polydispersity index (PDI), and zeta-potential of each peptide/pDNA complex prepared at N/P ratios of 8 and 16.

Peptide	N/P ratio	Size (nm)	PDI (μ/Γ2)	Zeta-potential (mV)
R9	8	357.5 ± 0.3	0.21 ± 0.01	22.1 ± 0.3
	16	188.7 ± 0.7	0.19 ± 0.01	25.8 ± 0.2
st7-5	8	1522.0 ± 39.0	0.61 ± 0.02	23.4 ± 0.1
	16	234.0 ± 2.1	0.27 ± 0.02	25.6 ± 0.1
st7-5_R	8	352.2 ± 4.1	0.28 ± 0.00	22.3 ± 0.3
	16	125.1 ± 0.2	0.20 ± 0.01	27.0 ± 0.3