BACH2 and lymphoma: By RT-PCR analysis using mesenteric lymphoma RNA from mouse 1206 we could by the use of a reverse primer located within exon 4 and a forward primer located immediately upstream of exon 3 (primer 2F) (see Figure 3A for primer localizations) detect a band corresponding to a transcript including Bach2 intron2 sequences as a novel exon (Figure 3B, left).