Antibodies, NeutralizingHIV AntibodiesHIV Envelope Protein gp120Antigens, CD4Neutralization TestsBinding SitesHIV-1AntibodiesAntibody SpecificityAntibodies, ViralAntibodies, MonoclonalAntibodies, BacterialAntibody FormationMolecular Sequence DataBinding Sites, AntibodyAntibody AffinityFluorescent Antibody TechniqueAmino Acid SequenceAntibodies, Anti-IdiotypicBase SequenceProtein BindingEpitopesAntibodies, NeoplasmAntibodies, ProtozoanAntibodies, AntinuclearBinding, CompetitiveCross ReactionsKineticsCell LineImmunoglobulin MModels, MolecularAutoantibodiesPromoter Regions, GeneticRecombinant ProteinsAntibodies, FungalAntigen-Antibody ReactionsRabbitsAntibodies, BispecificTranscription FactorsMice, Inbred BALB CProtein ConformationSingle-Chain AntibodiesImmunoglobulin GImmunoglobulin Fab FragmentsAntigen-Antibody ComplexAntibodies, BlockingDNA-Binding ProteinsAntibodies, CatalyticProtein Structure, TertiaryCells, CulturedAntibodies, HeterophileEpitope MappingDNACattleRecombinant Fusion ProteinsMutationMolecular WeightFluorescent Antibody Technique, IndirectElectrophoresis, Polyacrylamide GelHybridomasImmunoglobulin AImmune SeraEscherichia coliPeptide FragmentsTranscription, GeneticAntibodies, Monoclonal, HumanizedBlotting, WesternCloning, MolecularLigandsImmunizationAntibodies, AntiphospholipidEnzyme-Linked Immunosorbent AssayAntigensSequence Homology, Amino AcidImmunoenzyme TechniquesMutagenesis, Site-DirectedStructure-Activity RelationshipCell MembraneBacterial ProteinsAntigens, BacterialImmunoblottingPeptidesAntigens, SurfaceTransfectionImmunoglobulin FragmentsIodine RadioisotopesImmunohistochemistryRNA, MessengerTumor Cells, CulturedImmunization, PassiveGene Expression RegulationSequence AlignmentCarrier ProteinsTime FactorsImmunoassayB-LymphocytesAntigens, ViralRadioimmunoassayReceptors, Cell SurfaceCrystallography, X-Ray