MBNL1 and myotonic dystrophy type 1: We addressed the splicing pattern of transcripts previously described as altered in patients with DM1 (BIN1 (exon 11), MBNL1 (exon 5), LDB3 (exon 11), INSR (exon 11), DMD (exon 78), and ATP2A1 (exon 22)).