Cloning and characterization of spliced fusion transcript variants of synovial sarcoma: SYT/SSX4, SYT/SSX4v, and SYT/SSX2v.     ///    Stable transfection of an SYT/SSX4 expression vector into human and murine cell lines correlated with a down-regulation of SYT transcripts.     ///    This was also observed in a synovial sarcoma tumor expressing SYT/SSX4.     ///    "In the present investigation we cloned and sequenced the full-length cDNA of SYT/SSX1, SYT/SSX2 and SYT/SSX4 from synovial sarcoma tissues. "    ///    The SYT/SSX4 and SYT/SSX2 open reading frame also differed from previously reported SYT/SSX sequences by an in-frame addition of 93bp exon located in the junction between exon 7 and 8 of the SYT. 