Protein BindingAntibodies, NeutralizingHIV AntibodiesHIV Envelope Protein gp120Antigens, CD4Neutralization TestsBinding SitesHIV-1AntibodiesAntibody SpecificityAntibodies, ViralAntibodies, MonoclonalAntibodies, BacterialAntibody FormationMolecular Sequence DataAntibody AffinityBinding Sites, AntibodyAmino Acid SequenceFluorescent Antibody TechniqueAntibodies, BispecificAntibodies, Anti-IdiotypicBase SequenceEpitopesBinding, CompetitiveKineticsAntibodies, NeoplasmAntibodies, ProtozoanCross ReactionsImmunoglobulin Fab FragmentsAntibodies, AntinuclearCell LineModels, MolecularRecombinant ProteinsPromoter Regions, GeneticAntigen-Antibody ReactionsImmunoglobulin MRabbitsImmunoglobulin GMice, Inbred BALB CAutoantibodiesAntibodies, FungalLigandsProtein ConformationAntigen-Antibody ComplexSingle-Chain AntibodiesTranscription FactorsProtein Structure, TertiaryImmunoglobulin FragmentsDNA-Binding ProteinsAntibodies, BlockingCations, DivalentCells, CulturedRecombinant Fusion ProteinsEpitope MappingDNAMutationElectrophoresis, Polyacrylamide GelHaptensMolecular WeightEscherichia coliCattlePeptide FragmentsAntibodies, CatalyticAntibodies, HeterophileTranscription, GeneticCloning, MolecularStructure-Activity RelationshipBlotting, WesternIodine RadioisotopesImmunizationFluorescent Antibody Technique, IndirectHybridomasImmunoglobulin AImmune SeraEnzyme-Linked Immunosorbent AssayCell MembranePeptidesSequence Homology, Amino AcidAntibodies, Monoclonal, HumanizedMeiosisBacterial ProteinsMutagenesis, Site-DirectedAntigens, BacterialTime FactorsCrystallography, X-RayAntibodies, AntiphospholipidTransfectionAntigensCarrier ProteinsImmunoenzyme TechniquesTumor Cells, CulturedSurface Plasmon ResonanceSequence AlignmentSpermatocytesGene Expression RegulationT-LymphocytesImmunoblottingImmunoglobulin Variable RegionMagnesiumAntigens, Surface