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Variation of antigen-antibody precipitate concentration with antigen concentration at any given antibody concentration.
At any given antibody concentration, the prozone phenomenon is seen when there is failure of development of an adequate antigen-antibody agglutination complex due to excess antibody relative to antigen. Failure of development of an adequate antigen-antibody agglutination complex in postzone phenomenon is due to antigen excess relative to the antibody.
