Cell DifferentiationErythropoiesisHematopoiesisStem CellsHematopoietic Stem CellsCell LineageCells, CulturedBlood CellsGene Expression Regulation, DevelopmentalSignal TransductionCell ProliferationMice, Inbred C57BLTranscription FactorsEmbryonic Stem CellsBone Marrow CellsCell DivisionErythrocytesCell LineGene Expression RegulationMyeloid Progenitor CellsAntigens, CD34Mice, TransgenicRNA, MessengerMice, KnockoutFlow CytometryHomeodomain ProteinsColony-Forming Units AssayReverse Transcriptase Polymerase Chain ReactionPhenotypeDNA-Binding ProteinsTretinoinMolecular Sequence DataNeural Stem CellsBasic Helix-Loop-Helix Transcription FactorsImmunohistochemistryBase SequenceCell Culture TechniquesGene ExpressionEmbryo, MammalianErythroid Precursor CellsCell SeparationMesenchymal Stromal CellsTime FactorsLymphoid Progenitor CellsNeuronsMultipotent Stem CellsBone MarrowGene Expression ProfilingFetal BloodAntigens, DifferentiationReceptors, NotchModels, BiologicalSex DifferentiationAntigens, CDNeurogenesisIn Situ HybridizationGranulocytesBlood Cell CountB-LymphocytesTrans-ActivatorsCell CycleOsteoblastsTranscription, GeneticOsteogenesisCell MovementCell CountNerve Tissue ProteinsApoptosisBiological MarkersCell SurvivalRepressor ProteinsBlotting, WesternPromoter Regions, GeneticEpithelial CellsMembrane ProteinsTransfectionDown-RegulationCoculture TechniquesTumor Cells, CulturedMesodermUp-RegulationMutationRegenerationAdult Stem CellsNuclear ProteinsMuscle DevelopmentHL-60 CellsStem Cell FactorStem Cell TransplantationAdipogenesisDNA PrimersLeukemia, Erythroblastic, AcuteThymus GlandProto-Oncogene ProteinsOligodendrogliaMice, Mutant StrainsDimethyl SulfoxideMegakaryocytesBromodeoxyuridineGreen Fluorescent Proteins