Receptors, NotchReceptor, Notch1Receptor, Notch2Membrane ProteinsSignal TransductionAmino AcidsSequence Homology, Amino AcidAmino Acid SubstitutionBasic Helix-Loop-Helix Transcription FactorsAmyloid Precursor Protein SecretasesCloning, MolecularIntercellular Signaling Peptides and ProteinsMutationDrosophila ProteinsAmino Acids, EssentialGene Expression Regulation, DevelopmentalBase SequenceCell DifferentiationMolecular Sequence DataAmino Acid Transport SystemsTranscription FactorsProtein Structure, TertiaryReceptors, Cell SurfaceSequence AlignmentPrecursor T-Cell Lymphoblastic Leukemia-LymphomaAmino Acid MotifsBinding SitesIntracellular Signaling Peptides and ProteinsDrosophilaHomeodomain ProteinsCell LineProtein BindingEscherichia coliAmino Acid SequenceDipeptidesWingDNA, ComplementaryLigands