complement fixation(redirected from complement binding assay)
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The binding of active serum complement to an antigen-antibody pair. It is the basis for various diagnostic tests to detect the presence of a specific antigen or antibody.
the binding of complement to immune complexes or to certain foreign surfaces, as those of invading microorganisms.
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|Noun||1.||complement fixation - an immune response in which an antigen-antibody combination inactivates a complement (so it is unavailable to participate in a second antigen-antibody combination)|