Nuclear Localization SignalsCell NucleusActive Transport, Cell Nucleusalpha KaryopherinsProteasome Endopeptidase ComplexAmino Acid SequenceProteasome InhibitorsMolecular Sequence DataKaryopherinsbeta KaryopherinsCytoplasmProtein Sorting SignalsNuclear ProteinsNuclear Export SignalsRecombinant Fusion ProteinsHeLa CellsProtein TransportGreen Fluorescent ProteinsCell LineProtein Structure, TertiaryCOS CellsLuminescent ProteinsBase Sequenceran GTP-Binding ProteinMutationProtein BindingTransfectionSequence Homology, Amino AcidSequence DeletionDNA-Binding ProteinsSubcellular FractionsSignal TransductionCell NucleolusTranscription FactorsNucleoplasminsCell CompartmentationCercopithecus aethiopsCysteine EndopeptidasesAmino Acid MotifsMicroscopy, FluorescenceBiological TransportMultienzyme ComplexesCloning, MolecularBinding SitesLeupeptinsMutagenesis, Site-DirectedNuclear EnvelopePhosphorylationMicroscopy, ConfocalRNA-Binding ProteinsFluorescent Antibody TechniqueAmino Acids, BasicRecombinant ProteinsBlotting, WesternDNA, ComplementaryPlasmidsSaccharomyces cerevisiae ProteinsSequence AlignmentCarrier ProteinsSaccharomyces cerevisiaeZinc FingersRNA, MessengerTwo-Hybrid System TechniquesViral ProteinsCells, CulturedFluorescent Antibody Technique, IndirectConserved SequenceDNA PrimersTranscription, Geneticbeta-GalactosidaseNucleocytoplasmic Transport ProteinsReceptors, Cytoplasmic and Nuclear3T3 CellsProtein IsoformsMutagenesisBoronic AcidsGenes, ReporterNuclear PorePyrazinesTranscriptional ActivationCysteine Proteinase InhibitorsPhosphoproteinsTrans-ActivatorsModels, BiologicalNIH 3T3 CellsAntigens, Polyomavirus TransformingCell Cycle ProteinsCell Line, TumorFungal ProteinsProteinsFatty Acids, UnsaturatedGene Expression RegulationImmunohistochemistryImmunoprecipitationRepressor ProteinsN-Acylneuraminate CytidylyltransferaseImmunoblottingTumor Cells, CulturedNuclear Pore Complex ProteinsNuclear Matrix