UASt regulatory sequences drive expression of a Topors cDNA, mutated to carry a C118S amino acid replacement and tagged with EGFP.
Expression of ToporsC118S.Scer\UAS.T:Avic\GFP-EGFP under the control of Scer\GAL4hs.PB does not suppress the ability of mod(mdg4)ul to suppress the cut wing margin phenotype of ct6.