Amino acid replacement S312A, in the Rel homology region of the protein.
One copy of dlS312A does not rescue embryos derived from dl null mothers to hatching, while two copies of dlS312A supports a low level of hatching of embryos derived from dl null mothers. Embryos derived from dl null mothers carrying one copy of dlS312A are weakly dorsalised, while those embryos derived from dl null mothers carrying two copies of dlS312A have wild-type cuticles. Embryos derived from dl1 cact7 mothers carrying dlS312A are severely dorsalised.
dlS312A partially rescues dlunspecified