Fig. 4From: DNA Tetrahedron Delivery Enhances Doxorubicin-Induced Apoptosis of HT-29 Colon Cancer CellsThe cytotoxicity and antitumor efficiency of Dox complexes and DNA tetra for HT-29 cells. a The viability of HT-29 cells incubated with DNA tetra at different concentrations for 24 or 48 h. b The antitumor efficiency of Dox complexes at 100 μM. c The viability of HT-29 cells incubated with folic acid-DNA tetra-Dox at different concentrations for 24 or 48 hBack to article page