(A) dTtaPS-mediated delivery of polyA-tailed PNA and PMO sequences 9 and 10, respectively, in HeLa pLuc 705 cells cultured in serum-containing medium. (B) 2′-OMeUtaPS-mediated delivery of polyA-tailed PNA and PMO sequences 9 and 10, respectively, under conditions identical to those used in (A). In all experiments, the concentration of each sequence was kept at 1.0 µM whereas the concentration of dTtaPS or 2′-OMeUtaPS was kept at 2.0 µM. Error bars represent the mean ± SD of three independent experiments. RLU, relative light units.