Cell DifferentiationErythropoiesisHematopoiesisStem CellsHematopoietic Stem CellsCell LineageBlood CellsCells, CulturedBone Marrow CellsErythrocytesGene Expression Regulation, DevelopmentalMice, Inbred C57BLAntigens, CD34Cell ProliferationSignal TransductionColony-Forming Units AssayMyeloid Progenitor CellsFlow CytometryTranscription FactorsCell DivisionMice, TransgenicEmbryonic Stem CellsMice, KnockoutThymus GlandLymphopoiesisCell SeparationGene Expression RegulationHomeodomain ProteinsCell LineFetal BloodNeural Stem CellsRNA, MessengerBone MarrowBasic Helix-Loop-Helix Transcription FactorsReceptors, NotchPhenotypeBlood Cell CountErythroid Precursor CellsReverse Transcriptase Polymerase Chain ReactionMultipotent Stem CellsB-LymphocytesAntigens, CDLymphoid Progenitor CellsCell Culture TechniquesImmunohistochemistryStem Cell FactorEmbryo, MammalianDNA-Binding ProteinsMolecular Sequence DataCell MovementCell CountProto-Oncogene Proteins c-kitNeuronsBase SequenceTime FactorsGranulocyte-Macrophage Progenitor CellsNeurogenesisStem Cell TransplantationGene ExpressionT-LymphocytesImmunophenotypingGranulocytesPrecursor Cells, B-LymphoidBiological MarkersModels, BiologicalInterleukin-3Gene Expression ProfilingFetusMice, Inbred BALB CPrecursor Cells, T-LymphoidTretinoinCell SurvivalMesenchymal Stromal CellsMast CellsMembrane ProteinsStromal CellsEpithelial CellsTrans-ActivatorsNerve Tissue ProteinsApoptosisCell CycleClone CellsEndothelial CellsMice, Mutant StrainsAntigens, DifferentiationCoculture TechniquesIn Situ HybridizationTranscription, GeneticOligodendrogliaRecombinant ProteinsGreen Fluorescent ProteinsSpleenRegenerationMutationAdult Stem CellsNestinStem Cell NicheInterleukin-7MorphogenesisAnimals, Newborn