UASt regulatory sequences are fused upstream of sequence encoding an AUG start codon, the EGFP coding sequence and 47 GlyPro dipeptide repeats (the codons used avoid generating the pathogenic GGGGCC combination).
Expression of Zzzz\poly-GP47.Scer\UAS.T:Avic\GFP-EGFP under the control of Scer\GAL4GMR.PU does not lead to any apparent degenerative eye phenotype, as compared to controls.