Several mis-spliced events previously validated in skeletal muscles of DM1 patients such as BIN1 exon 11, CAPZB exon 8, DMD exons 71 and 78, GFPT1 exon 9, KIF13A exon 32, ANK2 exon 21, UBE2D3 exon 10 and LDB3 exon 5 were also detected in the differentiated DM1-cl5 myoblast cell line. The gene discussed is UBE2D3; the disease is myotonic dystrophy type 1.