IMMUNOLOGY

Detailed explanation-1: -The secondary stage leads to demonstrable events such as pre-cipitation, agglutination, lysis of cells, killing of live antigens, neutral-ization reactions, complement fixation and enhancement of phagocy-tosis. Thus the antigen causing Agglutination was called agglutinin that causing precipitation precipitin.

Detailed explanation-2: -Antigen–antibody reactions are a mainstay for the rapid detection of proteins. Antibodies recognize proteins based on their structure as well as content, and can be very specific, binding to only a small part of an antigen (known as the epitope), and discriminating between highly similar epitopes.

Detailed explanation-3: -The process of agglutination involves two steps. First step is sensitization and second is lattice formation. It is attachment of specific antibody to corresponding antigen.