<p>(A). Samples from the normal human myoblasts cells treated with 2OMePS AOs; (B). Samples from the normal human myoblasts cells treated with PMOs. +hE50 representing normal dystrophin mRNA containing hE50; −hE50, representing dystrophin mRNA with hE50 skipped. Left lane is the 100 bp size marker; (C). A sequence showing skipping of the hE50 from the PCR product detected as –hE50 in the hE50AO24PMO treated normal human myoblasts cells in (B). (D). The bands marked with +hE50+hE51 representing normal human dystrophin mRNA (NhM) from normal human myoblasts; the bands marked with +hE50−hE51 representing mRNA from the skin fibroblasts of a DMD patient with exon 51 deletion; the bands marked with −hE50 and –hE51 representing mRNA from the skin fibroblasts with exon 50 skipped (both exons are absent). Control, without AO treatment.</p