title: Development and characterization of a monoclonal antibody which distinguishes the beta-subunit of human chorionic gonadotropin (beta hCG) in the presence of the hCG.
abstract: A monoclonal antibody specific for the beta-subunit of human chorionic gonadotropin (beta hCG) has been developed which has a cross reactivity of 0.23% with intact hCT. There was no cross reactivity with other glycoprotein pituitary hormones in the range in which they might be expected to be present in serum. The beta-subunits of hFSH, hTSH and hLH did not inhibit binding of [125I]iodo-beta hCG to the antibody at up to 250 ng/tube. The dissociation constant (Kd) with [125I]iodo-beta hCG was 3.3 x 10(-10), and the reaction had reached equilibrium within 1 h.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal; D006063:Chorionic Gonadotropin / Q000032:analysis* / Q000276:immunology; D018997:Chorionic Gonadotropin, beta Subunit, Human; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D007700:Kinetics; D051379:Mice; D010446:Peptide Fragments / Q000032:analysis* / Q000276:immunology; D011863:Radioimmunoassay / Q000379:methods
chemical_list: D000911:Antibodies, Monoclonal; D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments