UASt regulatory sequences drive expression of an secreted, extracellular form of Ser encoding all 14 EGF-like repeats plus an additional 72 amino acid residues. Amino acid residues 388-607 have been deleted.
visible, with Scer\GAL4Ser.PGF
wing margin, with Scer\GAL4Ser.PGF
Expression of Sersec.Del6.Scer\UAS under the control of Scer\GAL4Ser.PGF results in a notched wing margin.