Cell DifferentiationErythropoiesisHematopoiesisStem CellsBlood CellsHematopoietic Stem CellsCell LineageCells, CulturedErythrocytesBone Marrow CellsGene Expression Regulation, DevelopmentalMice, Inbred C57BLSignal TransductionCell ProliferationTranscription FactorsCell DivisionFlow CytometryEmbryonic Stem CellsMice, TransgenicAntigens, CD34Thymus GlandMice, KnockoutGene Expression RegulationLymphopoiesisCell LineColony-Forming Units AssayRNA, MessengerCell SeparationHomeodomain ProteinsBlood Cell CountB-LymphocytesPhenotypeReceptors, NotchFetal BloodReverse Transcriptase Polymerase Chain ReactionMolecular Sequence DataBasic Helix-Loop-Helix Transcription FactorsDNA-Binding ProteinsMyeloid Progenitor CellsBase SequenceBone MarrowImmunohistochemistryAntigens, CDCell Culture TechniquesEmbryo, MammalianTime FactorsGene ExpressionT-LymphocytesPrecursor Cells, T-LymphoidProto-Oncogene Proteins c-kitTretinoinCell MovementPrecursor Cells, B-LymphoidMast CellsNeural Stem CellsStem Cell FactorImmunophenotypingCell CountNeuronsModels, BiologicalMultipotent Stem CellsMice, Inbred BALB CGene Expression ProfilingErythroid Precursor CellsFetusBiological MarkersGranulocyte-Macrophage Progenitor CellsTrans-ActivatorsEpithelial CellsMembrane ProteinsTranscription, GeneticCell SurvivalGranulocytesMesenchymal Stromal CellsStem Cell TransplantationApoptosisStromal CellsCell CycleMice, Mutant StrainsClone CellsSpleenAntigens, DifferentiationMutationInterleukin-3Erythrocyte TransfusionCoculture TechniquesSex DifferentiationIn Situ HybridizationNeurogenesisMorphogenesisLeukocyte CountInterleukin-7Erythrocyte CountUp-RegulationDNA PrimersRecombinant ProteinsThymocytesLymphoid Progenitor CellsOsteogenesisProto-Oncogene Proteins