Cell LineageCell DifferentiationStem CellsGene Expression Regulation, DevelopmentalTranscription FactorsMice, TransgenicMolecular Sequence DataSignal TransductionPhylogenyHomeodomain ProteinsCells, CulturedMorphogenesisPhenotypeHematopoietic Stem CellsBase SequenceReceptors, NotchMice, Inbred C57BLCell DivisionEmbryonic Stem CellsFlow CytometryBody PatterningEmbryo, NonmammalianImmunohistochemistryIn Situ HybridizationBasic Helix-Loop-Helix Transcription FactorsModels, BiologicalCell LineMesodermDrosophilaDrosophila ProteinsCell SeparationEmbryo, MammalianEndodermMutationDNA-Binding ProteinsGene Expression RegulationMice, KnockoutGreen Fluorescent ProteinsNeuronsGene ExpressionClone Cells