title: [Farr's modified method and ways of determining the index of antibody heterogeneity and the mean assoication constant].
abstract: The modified Farr's method included mixing of the solutions of a univalent antigen and antibodies, precipitation of the antigen-antibody complexes with semisaturated ammonium sulfate solution, and determination of serological activity of the free antigen in the supernatent fluid. The mentioned modification permitted to determined the heterogeneity index and the mean association constant without resorting to labeled antigens. Besides the standard calculation method, the authors recommed simplified methods of heterogeneity index and the mean association of constant determination.
mesh_terms: D000906:Antibodies / Q000032:analysis*; D000915:Antibody Affinity; D000936:Antigen-Antibody Complex; D000941:Antigens / Q000032:analysis*; D006386:Hemagglutination Tests; D008722:Methods; D009500:Neutralization Tests
chemical_list: D000906:Antibodies; D000936:Antigen-Antibody Complex; D000941:Antigens
vernacular_title: Modifitsirovannyĭ method Farra i sposoby opredeleniia indeksa geterogennosti antitel i sredneĭ konstanty assotsiatsii.