An FRT cassette containing DsRed and y2 markers separates the αTub84B promoter from a full-length yki cDNA that has been mutated to carry a P88L amino acid substitution (blocks nuclear accumulation in response to mTor inhibition) plus three substitutions of phosphorylation sites (S111A, S168A and S250A). In addition, the coding sequence is tagged at the C-terminal end with EGFP.