Oncogenic Gene Fusion FGFR3-TACC3 Is Regulated by Tyrosine Phosphorylation..     ///    "These results demonstrate that FGFR3 kinase activity is essential for the oncogenic effects of the FGFR3-TACC3 fusion protein and could serve as a therapeutic target, but that phosphorylated tyrosine residues within the TACC3-derived portion are not critical for activity. "