UAS regulatory sequences drive expression of a C-terminal part of pros containing a 20Q polyQ tract (this is the normal length of the tract found in the wild-type protein). The polyQ tract is flanked by 33 amino acids on the N-terminal side and by 369 amino acids on the C-terminal side. The protein is tagged at the C-terminal end with Tag:HA.
Expression of prosZzzz\CAG.20Q.Scer\UAS.T:Ivir\HA1 in the developing eye under the control of Scer\GAL4GMR.PF does not generate a phenotypic, morphological change.
Retina expressing MlfScer\UAS.cKa and prosZzzz\CAG.20Q.Scer\UAS.T:Ivir\HA1 both under the control of Scer\GAL4GMR.PF exhibit a normal morphology.