Amino acids 30-37 have been removed from the crb intracellular domain.
Over expression of crbIntra16-29.Scer\UAS.T:Rnor\CD2 when driven by Scer\GAL4da.G32 does not cause a multicellular epithelium in embryos.
crbCD2.Intra16-29.UAS/Scer\GAL4385.3 fails to rescue crbunspecified