RT-PCR confirmed that SK-NEP-1 expresses EWS-FLI1 gene fusion transcripts characteristic of Ewing sarcoma, and DNA sequencing demonstrated the joining of exon 7 of EWS with exon 5 of FLI1 for these transcripts.     ///    "Rh1, which was previously categorized as an alveolar rhabdomyosarcoma cell line, also has a gene expression profile suggestive of Ewing sarcoma and expresses EWS-FLI1 fusion transcripts in which exon 7 of EWS is joined with exon 6 of FLI1. "