title: A radioimmunoassay to determine the subtypes D and Y of the hepatitis-B surface antigen.
abstract: A radioimmunologic test system for determining the subtypes D and Y of the hepatitis-B surface antigen (HBs-Ag, Australia antigen, HAA) is described. This technique uses the immunoadsorption principle. The antigen to be subtyped is incubated with an antiserum which contains (125)I-labeled antibodies to the antigenic determinants a, d, and y. The specificity of the antibody which is not consumed in forming the antigen-antibody complex is determined by absorption on agarose to which HBs-Ag of subtypes D and Y is coupled. This specificity permits conclusions as to the subtype of the hepatitis-B surface antigen which is being investigated.
mesh_terms: D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D006511:Hepatitis B Antigens