title: Characterization by Scatchard plots of monoclonal antibody enzyme conjugates directed against alpha-1-foetoprotein.
abstract: A radioimmunoassay was used to investigate the affinity of 2 monoclonal antibodies against human alpha-1-foetoprotein before and after conjugation with horseradish peroxidase. The equilibrium constant of the high-affinity antibody was reduced 10-fold whereas it remained unaffected in the low-affinity antibody. With the Scatchard diagram, quantification of unlabelled antibodies in the unpurified conjugate mixture is also possible if antibody affinity is changed by the coupling procedure.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology*; D000915:Antibody Affinity; D001666:Binding Sites, Antibody; D006801:Humans; D007124:Immunoenzyme Techniques / Q000592:standards*; D008433:Mathematics; D011863:Radioimmunoassay; D000509:alpha-Fetoproteins / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000509:alpha-Fetoproteins