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| Description: A depiction of the amount of precipitin that would form with different ratios of antigen and antibody. The prozone has antibody excess, and only small complexes with 2 antibody molecules and 1 antigen form. At equivalence, the number of paratopes roughly equals the number of epitopes, and the largest complexes form. The postzone has excess antigen, and the small complexes are formed of 2 antigens per antibody molecule.
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