Gene structure and primer/probe locations of EVI1 splice variants -1A, -1B, -1C, -1D, -3L, and MDS1/EVI1 (ME). The exons, introns, and translational starts are depicted in boxes, connective lines, and standup arrows, respectively. The first exon's size in base pairs (bp), primers (arrows), and probes (bold line) are shown. Nucleotide sequences of primer/probe are presented in Table S1.