Fig. 4

NAB2–STAT6 fusion gene in the SFT identified by RT-PCR and sequencing. Gel electrophoresis of PCR products reveals the various NAB2–STAT6 fusion genes with heterogeneous exon compositions in the tumor, which were identified using seven primer pairs (a). Direct sequencing shows the junction breakpoint in a stretch of NAB2 intronic sequence between the 3′-end of the NAB2 exon 6 and the 5′-end of the STAT6 exon 16 (b)