Antibodies, NeutralizingHIV AntibodiesHIV Envelope Protein gp120Antigens, CD4Neutralization TestsBinding SitesHIV-1AntibodiesAntibody SpecificityAntibodies, ViralSensitivity and SpecificityAntibodies, MonoclonalAntibodies, BacterialMolecular Sequence DataSubstrate SpecificityAntibody FormationAmino Acid SequenceBinding Sites, AntibodyBase SequenceAntibody AffinityProtein BindingFluorescent Antibody TechniqueEpitopesAntibodies, Anti-IdiotypicKineticsModels, MolecularBinding, CompetitiveCross ReactionsAntibodies, NeoplasmAntibodies, ProtozoanAntibodies, AntinuclearCell LineRecombinant ProteinsSpecies SpecificityImmunoglobulin MAutoantibodiesPromoter Regions, GeneticProtein ConformationRabbitsTranscription FactorsProtein Structure, TertiaryImmunoglobulin GAntigen-Antibody ReactionsAntibodies, FungalMice, Inbred BALB CEscherichia coliDNADNA-Binding ProteinsMutationRecombinant Fusion ProteinsSequence Homology, Amino AcidAntibodies, BispecificCloning, MolecularImmunoglobulin Fab FragmentsSingle-Chain AntibodiesAntigen-Antibody ComplexEnzyme-Linked Immunosorbent AssayCattleCells, CulturedElectrophoresis, Polyacrylamide GelMolecular WeightStructure-Activity RelationshipAntibodies, BlockingMutagenesis, Site-DirectedPeptide FragmentsLigandsPeptidesSequence AlignmentImmune SeraEpitope MappingTranscription, GeneticBacterial ProteinsHybridomasAntibodies, HeterophileAntibodies, CatalyticBlotting, WesternImmunoglobulin AFluorescent Antibody Technique, IndirectCrystallography, X-RayImmunoenzyme TechniquesAntigens, BacterialImmunoassayAntigensTransfectionTime FactorsCell MembraneImmunizationAntibodies, Monoclonal, HumanizedCarrier ProteinsRNA, MessengerImmunoblottingDNA PrimersPeptide LibraryGene Expression RegulationAntigens, SurfacePolymerase Chain ReactionImmunoglobulin FragmentsImmunohistochemistryAntibodies, AntiphospholipidTumor Cells, Cultured