Cell LineageHematopoietic Stem CellsLymphopoiesisIkaros Transcription FactorLeukopoiesisCell DifferentiationHematopoiesisPrecursor Cells, B-LymphoidB-LymphocytesMyeloid CellsLymphocytesBone Marrow CellsErythroid Precursor CellsThymus GlandT-LymphocytesImmunophenotypingAntigens, CD34Mice, Inbred C57BLBone MarrowGranulocytesFlow CytometryLeukemiaMice, TransgenicMice, KnockoutAntigens, CDCells, CulturedKiller Cells, NaturalMice, Mutant StrainsPhylogenyTranscription FactorsMolecular Sequence DataBone Marrow TransplantationMice, SCIDDNA-Binding ProteinsBase SequenceProto-Oncogene ProteinsSpleenCell LineEvolution, MolecularSequence Analysis, DNAStem CellsBiological EvolutionGenetic VariationGene Expression Regulation, DevelopmentalDNA, MitochondrialPhylogeographySpecies SpecificityGenetic SpeciationEmbryonic Stem CellsHomeodomain ProteinsPhenotypeGeographyAmino Acid SequenceModels, GeneticFossilsCluster AnalysisMultipotent Stem CellsSequence AlignmentSignal TransductionGene DuplicationMesodermLikelihood FunctionsBasic Helix-Loop-Helix Transcription FactorsDNA, RibosomalHaplotypesEmbryo, MammalianGenetics, PopulationPolymerase Chain ReactionAngiospermsBayes TheoremDNA PrimersGenomeGene Expression RegulationEndodermRNA, Ribosomal, 16SMultigene FamilyGenotypeMegakaryocytesSelection, GeneticReverse Transcriptase Polymerase Chain ReactionMutationCytochromes bPrimatesDNA, BacterialEmbryo, NonmammalianReceptors, NotchModels, BiologicalHominidaeVertebratesChromosomes, Human, YOligodendrogliaIn Situ HybridizationSequence Homology, Nucleic AcidCell SeparationCell ProliferationCell DivisionRNA, MessengerClone CellsGene ExpressionEctoderm