Characteristics of F-DPC/pIL-12/iPDL-1 complexes. (A) The structure model of F-DPC/pIL-12/iPDL-1 complexes. (B) Morphological characteristics of F-DPC/pIL-12/iPDL-1 by TEM observation (scale bar = 20 nm). (C) Particle sizes distribution of F-DPC/pIL-12/iPDL-1 complexes. (D) Zeta-potential of F-DPC/pIL-12/iPDL-1 complexes. (E) Agarose gel electrophoresis assay of F-DPC nanoparticles loading pIL-12. Lanes 2–4, bare pIL-12; lanes 5–13, different mass ratios of pIL-12 with F-DPC nanoparticles (lanes 5–7, 1:12.5; lanes 8–10, 1:25; lanes 11–13, 1:50).