HematopoiesisHematopoietic Stem CellsFetusHematopoiesis, ExtramedullaryLiverBone Marrow CellsColony-Forming Units AssayBone MarrowHematopoietic SystemYolk SacMyelopoiesisCell LineageCell DifferentiationCore Binding Factor Alpha 2 SubunitErythropoiesisAntigens, CD34Erythroid Precursor CellsHemangioblastsGATA1 Transcription FactorGATA2 Transcription FactorGranulocytesErythroid CellsMyeloid Progenitor CellsMice, Inbred C57BLMesonephrosStem Cell FactorGene Expression Regulation, DevelopmentalMegakaryocytesZebrafishLymphopoiesisHematopoietic Cell Growth FactorsCells, CulturedMice, KnockoutMyeloid CellsZebrafish ProteinsProto-Oncogene ProteinsPlatelet Membrane Glycoprotein IIbTranscription FactorsLeukemiaPrimary MyelofibrosisStromal CellsFlow CytometryInterleukin-3Proto-Oncogene Proteins c-mybPancytopeniaSpleenBone Marrow TransplantationBlood CellsProto-Oncogene Proteins c-kitEmbryo, MammalianHematopoietic Stem Cell TransplantationMyelodysplastic SyndromesMyeloproliferative DisordersErythroblastsGranulocyte Colony-Stimulating FactorThrombopoiesisCore Binding Factor beta SubunitFetal BloodDNA-Binding ProteinsBlood Cell CountStem CellsErythrocyte CountHemocytesCell DivisionLeukopoiesisGranulocyte-Macrophage Colony-Stimulating FactorMice, TransgenicSignal TransductionChimeraErythropoietinMice, Mutant Strains