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Fig. 5. Induction of Dll expression in the eye disc. (A-C) Antibody staining with {alpha}-DLL antibody on late third instar eye discs carrying the ey-Gal4 and the UAS-ey (A), the UAS-ey{Delta}PD (B) and the UAS-ey{Delta}HD (C) transgenes in an ey2 mutant background. DLL is induced in small patches of cells only in the absence of the EY-HD (arrows in C). (D) Antennal-like outgrowth from the adult eye of a fly carrying the ey-Gal4 and the UAS-ey{Delta}HD transgene in an ey2 mutant background. The arrow indicates the regular antenna and the arrowhead the ectopic antenna.





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