title: Monoclonal antibodies reactive with idiotypic and variable-region specific determinants on human immunoglobulins.
abstract: Monoclonal antibody JG-B1, specific for the human VKIIIb sub-subgroup of L chains, and JG-B4 specific for an idiotypic determinant on Glo, a monoclonal human IgM-VKIIIb anti-IgG, were produced and characterized. The VKIIIb determinant was detected on L chains alone and intact immunoglobulins with VKIIIb L chains. However, the idiotypic determinant was expressed only on IgM-Glo and required association of H and L chains. Binding of the immunogen Glo, to its antigen-IgG partially inhibited anti-idiotype and anti-VKIIIb binding. Cross-inhibition experiments demonstrated that intact pentameric IgM-Glo expressed one-half the number of idiotypic sites as VKIIIb determinants. However, Glo half-molecules expressed equal numbers of idiotypic and VKIIIb determinants. This is the first described monoclonal antibody produced by hybridoma technology which recognizes an antigenic determinant specific for a single variable region in intact immunoglobulin.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D000937:Antigen-Antibody Reactions; D003429:Cross Reactions; D003450:Cryoglobulins / Q000276:immunology; D000939:Epitopes / Q000276:immunology*; D005260:Female; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D007128:Immunoglobulin Fragments / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D007075:Immunoglobulin M / Q000276:immunology; D007135:Immunoglobulin Variable Region / Q000276:immunology*; D051379:Mice; D008815:Mice, Inbred Strains; D009194:Myeloma Proteins / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D003450:Cryoglobulins; D000939:Epitopes; D007128:Immunoglobulin Fragments; D007074:Immunoglobulin G; D007130:Immunoglobulin Idiotypes; D007075:Immunoglobulin M; D007135:Immunoglobulin Variable Region; D009194:Myeloma Proteins