interaction

interaction The reaction between an antigen and antibody is the basis for humoral immunity or antibody mediated immunity. The reaction between antigen and antibody occurs in three stages. During the first stage, the reaction involves the formation of antigen - antibody complex. The next stage leads to visible events like precipitation, agglutination, etc., The final stage includes destruction of antigen or its neutralization (Fig. . ) . reaction The binding force between antigen and antibody is due to three factors . They are closeness between antigen and antibody, non- covalent bonds or intermolecular forces and affinity of antibody. Immunology are known as antitoxins . This specific antibody is produced by a host cell in response to a bacterial exotoxin or corresponding toxoid (inactivated toxin).