UAS regulatory sequences drive expression of exd amino acid residues 178-300, in which exd nuclear localization signal 1 (NLS1) and nuclear localization signal 2 (NLS2) have been mutated (residues 240, 241, 242, 291 and 292 have been mutated to Ala residues). The protein is tagged at the N-terminal end with Tag:MYC and GFP.