UASp regulatory sequences drive expression of trk containing the amino acid replacement S77A.
Scer\GAL4VP16.nanos.UTR/trkS77A.UASp partially rescues trkΔ
Maternal expression of trkS77A.Scer\UAS.P\T under the control of Scer\GAL4nos.UTR.T:Hsim\VP16 rescues the phenotype of embryos laid by trkΔ females in 16% of cases.