Receptors, IgGReceptors, FcImmunoglobulin GAntigen-Antibody ComplexAntigens, DifferentiationReceptors, InterferonPhagocytosisRosette FormationImmunoglobulin Fc FragmentsMonocytesReceptor AggregationAntibody-Dependent Cell CytotoxicityAntibodies, MonoclonalNeutrophilsAntigens, CDEnzyme PrecursorsInterferon-gammaMacrophagesImmunologic CappingChorionic VilliProtein-Tyrosine KinasesCell LineOpsonin ProteinsMolecular Sequence DataReceptors, IgEErythrocytesSignal TransductionRespiratory BurstImmunoglobulin Fab FragmentsTyrosineCross-Linking ReagentsNeutrophil ActivationCells, CulturedPhosphorylationPhagocytesFlow CytometryPolymorphism, GeneticAntigens, Differentiation, B-LymphocyteAmino Acid SequenceIntracellular Signaling Peptides and ProteinsBase SequenceRecombinant ProteinsKiller Cells, NaturalTransfectionZAP-70 Protein-Tyrosine KinaseTumor Cells, CulturedMacromolecular SubstancesReceptors, ImmunologicDose-Response Relationship, ImmunologicGPI-Linked ProteinsAllelesType C PhospholipasesArthritis, RheumatoidMice, Inbred BALB CProtein BindingGenotypePhosphotransferases (Alcohol Group Acceptor)Mice, Inbred C57BLMice, KnockoutSolubilityRecombinant Fusion ProteinsKineticsRNA, MessengerLymphocytesB-LymphocytesLigandsEnzyme ActivationMolecular WeightAntibody SpecificityGuinea PigsBinding Sites, AntibodyDown-RegulationTumor Necrosis Factor-alphaImmunoblottingGamma RaysRabbitsPolymerase Chain ReactionCytotoxicity, ImmunologicCytokinesCalciumUp-RegulationLymphocyte ActivationChromosomes, Human, Pair 21PhosphotyrosineT-LymphocytesElectrophoresis, Polyacrylamide GelCell MembraneAntibodiesMacrophage ActivationGlycosylationCHO CellsCricetinaeSTAT1 Transcription FactorGene ExpressionLeukocytes, MononuclearGene Expression RegulationBinding SitesHLA-DR AntigensChromatography, AffinityCell Line, Transformed