UASp regulatory sequences drive expression of trk containing the amino acid replacement L81A.
trkL81A.UASp/Scer\GAL4VP16.nanos.UTR partially rescues trkΔ
Maternal expression of trkL81A.Scer\UAS.P\T under the control of Scer\GAL4nos.UTR.T:Hsim\VP16 rescues the phenotype of embryos laid by trkΔ females in 12% of cases.