Defective VirusesMurine Acquired Immunodeficiency SyndromeHelper VirusesGene DeletionVirus ReplicationSequence DeletionMolecular Sequence DataViral InterferenceGenetic Complementation TestCell LineLeukemia Virus, MurineGenes, ViralMutationViral ProteinsBase SequenceDNA, ViralRNA, ViralChromosome DeletionAmino Acid SequenceGenome, ViralMutant ProteinsRNA VirusesVaccinia virusPhenotypeEscherichia coliMutagenesis, Site-DirectedBacterial ProteinsPlasmidsSimian virus 40Receptors, VirusBinding SitesProtein BindingCloning, MolecularTranscription, GeneticTransfectionVirus AssemblyProtein Structure, TertiaryVirus CultivationSequence Homology, Amino AcidVirulenceMice, Mutant StrainsDNA PrimersVirus SheddingCercopithecus aethiopsMutagenesis, InsertionalPlant VirusesVirus DiseasesDNA VirusesRecombination, GeneticGenes, BacterialPoint MutationAmino Acid SubstitutionKineticsDNA-Binding ProteinsGene Expression Regulation, BacterialSindbis VirusTranscription FactorsPolymerase Chain ReactionTemperaturePromoter Regions, GeneticCricetinaeSequence AlignmentRestriction MappingMeasles virusRecombinant Fusion ProteinsCells, CulturedChromosome MappingInfluenza A Virus, H1N1 SubtypeSequence Analysis, DNAStructure-Activity RelationshipRabies virusRNA, MessengerModels, MolecularFungal ProteinsHepatitis B virusInfluenza A Virus, H5N1 SubtypeVero CellsVirionDNA Mutational AnalysisSaccharomyces cerevisiae ProteinsViral Plaque AssayMembrane ProteinsHeLa CellsAntigens, ViralSignal TransductionVirus ActivationGenesInfluenza A Virus, H3N2 SubtypeGenetic VectorsProtein ConformationVesicular stomatitis Indiana virusEscherichia coli ProteinsWest Nile virusGene Expression Regulation, ViralAllelesOpen Reading FramesCarrier ProteinsVirus LatencyRespiratory Syncytial VirusesPhylogeny