IMMUNOLOGY

Detailed explanation-1: -Precipitation Reaction Liquid Precipitation: An antigen-antibody reaction is carried out by adding increasing amounts of antigen to tubes containing a constant amount of antibody. Precipitation results from the combined reaction of the antigen and antibody.

Detailed explanation-2: -Precipitation reactions are based on the interaction of antibodies and antigens. They are based on two soluble reactants that come together to make one insoluble product, the precipitate. These reactions depend on the formation of lattices (cross-links) when antigen and antibody exist in optimal proportions.

Detailed explanation-3: -A precipitation reaction can occur when two solutions containing different salts are mixed and a cation or anion pair in the resulting combined solution forms an insoluble salt. This salt, then, is what precipitated out of the solution. Ions in a solution react with each other to form a new substance.