Amino acid replacement S317A, in the Rel homology region of the protein.
dlS317A does not rescue embryos derived from dl null mothers to hatching. Embryos derived from dl null mothers carrying one copy of dlS317A are strongly dorsalised, while those embryos derived from dl null mothers carrying two copies of dlS317A are more weakly dorsalised. Embryos derived from dl1 cact7 mothers carrying dlS317A are lateralised.
dlS317A partially rescues dlunspecified