Cell DifferentiationErythropoiesisHematopoiesisStem CellsCell ProliferationCells, CulturedCell LineageHematopoietic Stem CellsSignal TransductionGene Expression Regulation, DevelopmentalCell DivisionMice, Inbred C57BLTranscription FactorsBone Marrow CellsCell LineGene Expression RegulationEmbryonic Stem CellsRNA, MessengerMice, TransgenicMice, KnockoutFlow CytometryBlood CellsReverse Transcriptase Polymerase Chain ReactionImmunohistochemistryHomeodomain ProteinsPhenotypeDNA-Binding ProteinsMolecular Sequence DataThymus GlandAntigens, CD34Base SequenceGene ExpressionApoptosisB-LymphocytesTretinoinCell CycleReceptors, NotchCell MovementCell Culture TechniquesBasic Helix-Loop-Helix Transcription FactorsCell SeparationColony-Forming Units AssayLymphopoiesisTime FactorsEmbryo, MammalianT-LymphocytesCell SurvivalSex DifferentiationNeuronsEpithelial CellsAntigens, CDNeural Stem CellsTrans-ActivatorsGene Expression ProfilingErythrocytesModels, BiologicalCell CountTranscription, GeneticMice, Inbred BALB CMesenchymal Stromal CellsMyeloid Progenitor CellsTumor Cells, CulturedBlotting, WesternAntigens, DifferentiationUp-RegulationFetal BloodOsteogenesisOsteoblastsTransfectionBone MarrowIn Situ HybridizationCell Line, TumorDown-RegulationMutationMembrane ProteinsImmunophenotypingBromodeoxyuridineLymphocyte ActivationMultipotent Stem CellsProto-Oncogene Proteins c-kitNeurogenesisBiological MarkersProto-Oncogene ProteinsCoculture TechniquesStem Cell FactorDNA PrimersMorphogenesisFetusPromoter Regions, GeneticRepressor ProteinsStromal CellsClone CellsErythroid Precursor CellsMice, Mutant StrainsNuclear ProteinsRecombinant ProteinsNerve Tissue ProteinsAdipogenesisPrecursor Cells, B-LymphoidGranulocytes