Cell LineageCell DifferentiationStem CellsPhylogenyGene Expression Regulation, DevelopmentalSex Determination ProcessesMolecular Sequence DataTranscription FactorsMice, TransgenicBase SequenceHematopoietic Stem CellsSex Determination AnalysisHomeodomain ProteinsEvolution, MolecularChromatography, High Pressure LiquidPhenotypeMice, Inbred C57BLCells, CulturedCalibrationGerm CellsAmino Acid SequenceEmbryonic Stem CellsThymus GlandMesodermSequence Analysis, DNABiological EvolutionSignal TransductionEmbryo, MammalianBasic Helix-Loop-Helix Transcription FactorsModels, BiologicalReproducibility of ResultsDNA-Binding ProteinsMorphogenesisEmbryo, NonmammalianFlow CytometryMice, KnockoutIn Situ HybridizationEctodermMutationChimeraTime FactorsGene Expression RegulationHematopoiesisFlow Injection AnalysisEndodermReceptors, NotchCell DivisionMultipotent Stem CellsB-LymphocytesBone Marrow CellsSpecies SpecificityCell LineBody PatterningRNA, MessengerLymphopoiesisPolymerase Chain ReactionGenetic VariationImmunohistochemistryIndicators and ReagentsUrochordataGene ExpressionBlastomeresClone CellsGonadsDNA PrimersSensitivity and SpecificityEmbryonic DevelopmentDrosophila ProteinsT-LymphocytesGreen Fluorescent ProteinsLimit of DetectionCaenorhabditis elegansDrosophilaReverse Transcriptase Polymerase Chain ReactionCell ProliferationCell SeparationReference StandardsNeural CrestMethodsSpectrophotometry, UltravioletEnteroendocrine CellsPluripotent Stem CellsGerm LayersSex DifferentiationTranscription, GeneticIntegrasesBiological MarkersBlastocystGene Expression ProfilingTrans-ActivatorsModels, GeneticAnimals, Genetically ModifiedZebrafishTrophoblastsDNAOrgan SpecificityGenotypeSpectrophotometry, AtomicSequence AlignmentCloning, Molecular