UAS regulatory sequences drive expression of an N-terminal pyd cDNA fragment (amino acids 1-489), comprising the three PDZ domains and associated regions. The protein is tagged with the mRFP1 fluorescent protein.
Expression of pydN.Scer\UAS.T:Disc\RFP under the control of Scer\GAL4GMR.PF results in only very rare inter-ommatidial precursor cell patterning defects.