| prozone | <immunology> Prozone phenomena occur in immunological reactions when the concentrations of antibody or other active immune agent are so high that the optimum concentration for maximal reaction with antigen is exceeded. Immunological phenomena in the prozone region may show partial or total inhibition. (18 Nov 1997) |
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| prozone |
in an agglutination or precipitation reaction, the zone of relatively high antibody concentrations within which no reaction occurs. As the antibody concentration is lowered below the prozone, the reaction occurs. This phenomenon may be due simply to antibody excess (see precipitin reaction, under reaction), or it may be due to blocking antibody or to nonspecific inhibitors in serum. Called also prezone.
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| prozone r. |
see prozone.
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