Antibodies, NeutralizingHIV AntibodiesHIV Envelope Protein gp120Antigens, CD4Neutralization TestsBinding SitesHIV-1AntibodiesAntibody SpecificityAntibodies, ViralAntibodies, MonoclonalAntibodies, BacterialMolecular Sequence DataAntibody FormationProtein BindingAmino Acid SequenceBinding, CompetitiveBinding Sites, AntibodyAntibody AffinityFluorescent Antibody TechniqueBase SequenceEpitopesAntibodies, Anti-IdiotypicCell LineKineticsRecombinant ProteinsAntibodies, NeoplasmRadioligand AssayAntibodies, ProtozoanCross ReactionsAntibodies, AntinuclearModels, MolecularPromoter Regions, GeneticImmunoglobulin MRabbitsTranscription FactorsAutoantibodiesProtein Structure, TertiaryLigandsProtein ConformationAntigen-Antibody ComplexDNA-Binding ProteinsRecombinant Fusion ProteinsAntibodies, FungalMice, Inbred BALB CAntigen-Antibody ReactionsImmunoglobulin GCells, CulturedImmunoglobulin Fab FragmentsDNACattleAntibodies, BispecificElectrophoresis, Polyacrylamide GelMutationPeptide FragmentsEscherichia coliCloning, MolecularStructure-Activity RelationshipSingle-Chain AntibodiesMolecular WeightAntibodies, BlockingEpitope MappingTranscription, GeneticCell MembraneSequence Homology, Amino AcidBlotting, WesternTransfectionCarrier ProteinsMutagenesis, Site-DirectedIodine RadioisotopesFluorescent Antibody Technique, IndirectPeptidesAntibodies, CatalyticEnzyme-Linked Immunosorbent AssayHybridomasAntibodies, HeterophileImmune SeraReceptors, Cell SurfaceBacterial ProteinsImmunoglobulin ARNA, MessengerTumor Cells, CulturedImmunoblottingImmunoenzyme TechniquesSequence AlignmentAntibodies, Monoclonal, HumanizedMembrane ProteinsGene Expression RegulationCHO CellsAntigensChromatography, AffinityAntigens, SurfacePrecipitin TestsGlycoproteinsImmunohistochemistryTime FactorsImmunizationAntibodies, AntiphospholipidRadioimmunoassayHeLa Cells