Son of Sevenless Protein, DrosophilaSon of Sevenless ProteinsSOS1 ProteinPhotoreceptor Cells, InvertebrateEye ProteinsDrosophilaReceptor Protein-Tyrosine KinasesEyeDrosophila Proteinsras Guanine Nucleotide Exchange FactorsSupraoptic NucleusProtein Tyrosine Phosphatases, Non-ReceptorMembrane Glycoproteinsras ProteinsPhotoreceptor CellsReceptors, PeptideGRB2 Adaptor ProteinGenes, InsectDrosophila melanogasterSignal Transductionsrc Homology DomainsMolecular Sequence Data