Janus Kinase 2Janus Kinase 3Janus Kinase 1Janus KinasesSTAT Transcription FactorsMyeloproliferative DisordersProtein-Tyrosine KinasesPolycythemia VeraSTAT5 Transcription FactorSTAT3 Transcription FactorSignal TransductionThrombocythemia, EssentialSTAT1 Transcription FactorPrimary MyelofibrosisTYK2 KinaseMilk ProteinsProto-Oncogene ProteinsTyrphostinsSuppressor of Cytokine Signaling ProteinsPhosphorylationTrans-ActivatorsReceptors, ErythropoietinTyrosineReceptors, ThrombopoietinDNA-Binding ProteinsEnzyme ActivationMutationCell LineMutation, MissenseReceptors, CytokineProtein Kinase InhibitorsAmino Acid SubstitutionSTAT6 Transcription FactorPolycythemiaThrombocytosisReceptors, ProlactinPhosphotyrosineCytokine Receptor gp130Receptors, SomatotropinCells, CulturedReceptors, InterferonErythropoietinCell Line, TumorReceptors, InterleukinInterleukin-6STAT2 Transcription FactorPoint MutationValineCOS CellsProtein Tyrosine Phosphatase, Non-Receptor Type 6TransfectionProtein Tyrosine Phosphatase, Non-Receptor Type 11Cell ProliferationApoptosisMolecular Sequence DataEnzyme InhibitorsInterferon-gammasrc Homology DomainsInterleukin-3Receptors, Interleukin-9Blotting, WesternProtein BindingPyrazolesHematopoietic Stem CellsProlactinInterleukin-2Receptors, Interleukin-4Growth HormoneProto-Oncogene Proteins c-pim-1PhenylalanineIntracellular Signaling Peptides and ProteinsGene Expression RegulationReceptors, Interleukin-2Recombinant ProteinsSevere Combined ImmunodeficiencyErythroid Precursor CellsProtein Tyrosine PhosphatasesPyrimidinesReceptors, LeptinHematopoiesis, ExtramedullaryLeukemia Inhibitory FactorDrosophila ProteinsInterferon-Stimulated Gene Factor 3Base SequenceCytokinesRecombinant Fusion ProteinsCell DivisionThrombopoietinCell SurvivalDNA Mutational AnalysisProtein Structure, TertiaryTumor Cells, CulturedAmino Acid SequenceSplenomegalyTranscription FactorsMutant ProteinsCell DifferentiationPrecipitin TestsK562 CellsBone Marrow Neoplasms