FLP-mediated excision of the engineered FRT-exon 3 containing GFP-FRT cassette in TI{GFP}sdtGFP3 (results in deletion of exon 3, including inserted GFP).
Scer\FLP1-mediated excision of the engineered FRT-exon 3 containing Avic\GFP-FRT cassette in TI{GFP}sdtGFP3 (results in deletion of exon 3, including inserted GFP) (deletion boundaries inferred).
sdtΔ3 stage 10 embryos show defects in posterior midgut remodeling, as shown by significantly fewer PGCs migrating through the posterior midgut epithelium, as compared to controls. In mutant eye discs, cells fail to form the expected six-cell rosettes and instead form elongated structures favoring early R3/R4 contacts.