HTT and Huntington disease: Since the above studies were done using transgenic Drosophila having 127 glutamate residues to simulate the polyglutamine-associated disease condition like Huntington’s disease, so we validated it further by expressing mutant exon I of the huntingtin gene having 93 CAG repeats (UAS-httex1PQ93) in the eye discs of Drosophila in GMR-specified manner.