UASt regulates expression of 3 GGGGCC repeats (i.e. a normal number of repeats found in the first intron of the human 'C9orf72' gene) following by the coding sequence for EGFP.
Expression of Zzzz\GGGGCC3.Scer\UAS.T:Avic\GFP-EGFP using different Scer\GAL4 drivers (including Scer\GAL4GMR.long and Scer\GAL4VGlut-OK371) fail to generate a phenotypic effect.