Expression of Zzzz\UPRTScer\UAS.T:Ivir\HA1 under the control of one of Scer\GAL4wor.PA, Scer\GAL4OK107, Scer\GAL4c179, Scer\GAL4elav.PLu, Scer\GAL4tub or Scer\GAL4repo does not result in lethality, developmental defects or delay in time to pupariation and eclosion.