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Intracellular uptake of complexes loaded with YOYO-1 pDNA in HCT 116 cells after incubation for 2 h at 37oC. (A, C) Flow cytometry analysis of the cellular uptake of various complexes. (B, D) Quantitative analysis of the cellular uptake efficiency after treatment with various complexes. *p < 0.05, **p < 0.01 and ***p < 0.001.
