UASt sequences drive expression of a BglII-XbaI fragment containing a cDNA (24 bp of 5'UTR, 2508 bp of coding sequence and 1178 bp of 3'UTR) for the human PAX3-FKHR fusion oncoprotein.
Expression of Hsap\FOXO1A::Hsap\PAX3Scer\UAS.cGa under the control of Scer\GAL4Mhc.PW causes lethality only when more than one copy of Hsap\FOXO1A::Hsap\PAX3Scer\UAS.cGa and/or Scer\GAL4Mhc.PW is present.