Cell LineageCell DifferentiationGene Expression Regulation, DevelopmentalStem CellsSignal TransductionMorphogenesisTranscription FactorsCells, CulturedPhenotypeDrosophilaDrosophila ProteinsBody PatterningReceptors, NotchImmunohistochemistryCell CycleCell LineModels, BiologicalCell DivisionHomeodomain ProteinsNeuronsCell SeparationFlow CytometryIn Situ HybridizationMolecular Sequence DataMutationEmbryo, NonmammalianBase SequenceGreen Fluorescent ProteinsCell CommunicationMice, TransgenicHedgehog ProteinsZebrafishEpithelial CellsGene ExpressionNerve Tissue ProteinsGene Expression ProfilingRNA, MessengerBasic Helix-Loop-Helix Transcription FactorsCell MovementAntigens, SurfaceEndodermMembrane ProteinsFluorescent Antibody TechniqueMice, Inbred C57BLAnimals, Genetically ModifiedLuminescent ProteinsMesencephalonEmbryonic DevelopmentGene Expression RegulationRetinaDNA-Binding ProteinsClone CellsMicroscopy, FluorescenceInsect ProteinsMitosisEmbryonic Stem CellsMicroscopy, ElectronCaenorhabditis elegansNeurogliaCell ProliferationCell AdhesionTranscription, GeneticAmino Acid SequenceBlastocystEpitheliumLasersGenes, InsectMesodermCentral Nervous SystemEmbryo, MammalianRecombinant Fusion ProteinsDrosophila melanogasterMice, KnockoutChick EmbryoPromoter Regions, GeneticGenes, ReporterFibroblastsTime FactorsHematopoietic Stem CellsCaenorhabditis elegans ProteinsBrainBiological MarkersCell MembraneTrans-ActivatorsAnimals, NewbornApoptosisTransfectionOrgan SpecificityReverse Transcriptase Polymerase Chain ReactionCell CountDNA PrimersCell PolarityB-LymphocytesHeLa CellsMembrane GlycoproteinsDNA, ComplementaryGene Expression Regulation, PlantBlotting, WesternArabidopsisCell Death