Sanger sequencing electropherogram of the TRAF1 exon 6-ALK exon 20 fusion junction. The sequences in blue are from exon 6 of the TRAF1 gene. The sequences in red are from exon 20 of ALK. The TRAF1-ALK fusion junction in this case is identical to that previously reported in the literature by Feldman and colleagues  and Abate et al. .