Megakaryocyte Progenitor CellsMegakaryocytesThrombopoiesisThrombopoietinHematopoietic Stem CellsReceptors, ThrombopoietinColony-Forming Units AssayInterleukin-3HematopoiesisThrombocytopeniaBone Marrow CellsPloidiesAntigens, CD34Stem Cell FactorBlood PlateletsCell DifferentiationBone MarrowErythropoietinCells, CulturedGranulocyte-Macrophage Colony-Stimulating FactorStem CellsRecombinant ProteinsCell DivisionPlatelet CountThrombocytosisCell LineagePlatelet Membrane Glycoprotein IIbMyeloid Progenitor CellsGATA1 Transcription FactorErythroid Precursor CellsPlatelet Factor 4Megakaryocyte-Erythroid Progenitor CellsMice, Inbred C57BLColony-Stimulating FactorsReceptors, CytokineFlow CytometryPolyploidyFetal BloodErythroid-Specific DNA-Binding FactorsGranulocytesLymphoid Progenitor CellsThrombocythemia, EssentialCell SeparationNF-E2 Transcription FactorInterleukin-11Cell ProliferationMultipotent Stem CellsCell CountNeural Stem CellsNF-E2 Transcription Factor, p45 SubunitErythropoiesisMice, TransgenicPlatelet Glycoprotein GPIb-IX ComplexLeukemia, Megakaryoblastic, AcuteAntigens, CDGranulocyte Colony-Stimulating FactorBlood Cell CountMice, KnockoutGene Expression Regulation, DevelopmentalGrowth SubstancesTranscription FactorsSignal TransductionHematopoietic Cell Growth FactorsPolyethylene GlycolsPlatelet Membrane GlycoproteinsNeurogenesisGPI-Linked ProteinsProto-Oncogene ProteinsPurpura, ThrombocytopenicErythroid CellsBlood Platelet DisordersProto-Oncogene Proteins c-kitPrimary MyelofibrosisCell LineCulture Media, Serum-FreePlatelet Glycoprotein GPIIb-IIIa ComplexHematopoietic Stem Cell MobilizationStem Cell TransplantationCell Culture TechniquesHematopoietic Stem Cell TransplantationClone CellsEndothelial CellsPlatelet TransfusionGene Expression RegulationProto-Oncogene Protein c-fli-1Blood CellsTime FactorsPlatelet ActivationSpleenCell SurvivalRNA, MessengerMolecular Sequence DataReverse Transcriptase Polymerase Chain ReactionOligodendrogliaEmbryo, MammalianBase SequencePolycythemia VeraNestinGranulocyte-Macrophage Progenitor CellsBasic Helix-Loop-Helix Transcription Factors