HematopoiesisHematopoiesis, ExtramedullaryHematopoietic Stem CellsYolk SacBone Marrow CellsHematopoietic SystemBone MarrowColony-Forming Units AssayCell DifferentiationCell LineageMyelopoiesisErythropoiesisGene Expression Regulation, DevelopmentalCore Binding Factor Alpha 2 SubunitAntigens, CD34Erythroid Precursor CellsHemangioblastsFetusMice, Inbred C57BLMesonephrosZebrafishLymphopoiesisSpleenGATA1 Transcription FactorGATA2 Transcription FactorGranulocytesCells, CulturedErythroid CellsMyeloid Progenitor CellsMice, KnockoutEmbryo, MammalianStem Cell FactorMegakaryocytesFlow CytometryTranscription FactorsHematopoietic Cell Growth FactorsZebrafish ProteinsThymus GlandAnimals, NewbornLeukemiaProto-Oncogene ProteinsStromal CellsMyeloid CellsBone Marrow TransplantationFetal BloodPlatelet Membrane Glycoprotein IIbStem CellsLiverPrimary MyelofibrosisProto-Oncogene Proteins c-kitInterleukin-3Hematopoietic Stem Cell TransplantationProto-Oncogene Proteins c-mybPancytopeniaErythroblastsBlood CellsAgingEmbryonic and Fetal DevelopmentDNA-Binding ProteinsMice, TransgenicCell DivisionRNA, MessengerMyelodysplastic SyndromesMyeloproliferative DisordersSignal TransductionEmbryo, NonmammalianMolecular Sequence DataGranulocyte Colony-Stimulating FactorThrombopoiesisB-LymphocytesCore Binding Factor beta SubunitMice, Mutant StrainsBlood Cell CountGestational AgeChimeraBase SequencePhenotypeAntigens, CDErythrocyte CountHemocytesBasic Helix-Loop-Helix Transcription FactorsGene Expression RegulationGonadsIn Situ HybridizationRadiation ChimeraLeukopoiesisGranulocyte-Macrophage Colony-Stimulating FactorReverse Transcriptase Polymerase Chain ReactionModels, BiologicalCell LineCell ProliferationHomeodomain ProteinsT-LymphocytesErythropoietinGene ExpressionHematologic DiseasesTime FactorsAnemia, AplasticClone CellsMice, SCID