MegakaryocytesMegakaryocyte Progenitor CellsThrombopoietinHematopoietic Stem CellsThrombopoiesisBone Marrow CellsCell DifferentiationReceptors, ThrombopoietinColony-Forming Units AssayHematopoiesisThrombocytopeniaInterleukin-3Stem CellsAntigens, CD34PloidiesCells, CulturedBlood PlateletsStem Cell FactorCell ProliferationBone MarrowCell DivisionCell LineageErythropoietinPlatelet CountGranulocyte-Macrophage Colony-Stimulating FactorRecombinant ProteinsThrombocytosisMice, Inbred C57BLPlatelet Membrane Glycoprotein IIbSignal TransductionMyeloid Progenitor CellsGATA1 Transcription FactorErythroid Precursor CellsFlow CytometryTranscription FactorsGene Expression Regulation, DevelopmentalPlatelet Factor 4Mice, TransgenicCell LineMice, KnockoutCell CountRNA, MessengerNeural Stem CellsGranulocytesCell SeparationColony-Stimulating FactorsGene Expression RegulationFetal BloodMegakaryocyte-Erythroid Progenitor CellsAntigens, CDReceptors, CytokineReverse Transcriptase Polymerase Chain ReactionMultipotent Stem CellsApoptosisImmunohistochemistryCell CycleCell SurvivalErythroid-Specific DNA-Binding FactorsErythropoiesisMolecular Sequence DataCell Culture TechniquesPolyploidyTime Factors