precipitin

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precipitin

 [pre-sip´ĭ-tin]
an antibody to antigen that specifically aggregates the antigen in vivo or in vitro to give a visible precipitate.
precipitin reaction a reaction involving the specific serologic precipitation of an antigen in solution with its specific antiserum in the presence of electrolytes. The reaction is used in the typing of pneumococcus strains, in testing whether blood is human or animal, and for diagnostic purposes.
precipitin test any test in which the positive reaction consists of the formation and deposit of a precipitate in the fluid being tested. See also precipitin reaction.

pre·cip·i·tin

(prē-sip'i-tin),
An antibody that under suitable conditions combines with and causes its specific and soluble antigen to precipitate from solution.

precipitin

/pre·cip·i·tin/ (-sip´it-in) an antibody to soluble antigen that specifically aggregates the macromolecular antigen in vivo or in vitro to give a visible precipitate.

precipitin

(prĭ-sĭp′ĭ-tĭn)
n.
An antibody that reacts with a specific soluble antigen to produce a precipitate.

precipitin

[prəsip′itin]
Etymology: L, praecipitare + Gk, anti, against; AS, bodig, body; Gk, genein, to produce
an antibody that causes the formation of an insoluble complex when combined with a specific soluble antigen. Compare agglutinin. See also agglutination, antiglobulin.

pre·cip·i·tin

(prĕ-sip'i-tin)
An antibody that under suitable conditions combines with and causes its specific and soluble antigen to precipitate from solution.

precipitin

see ANTIBODY.

Precipitin

An antibody in blood that combines with an antigen to form a solid that separates from the rest of the blood.

precipitin

an antibody to soluble antigen that specifically aggregates the antigen in vivo or in vitro to give a visible precipitate.

precipitin curve
a plot showing the amount of antibody precipitated with increasing amounts of antigen added in a precipitin reaction.
precipitin reaction, precipitin test
a reaction involving the specific precipitation of an antigen in solution by mixing with a specific antiserum in the presence of electrolytes. See also lattice theory.
References in periodicals archive ?
Transmission electron microscopy of the circumoval immune precipitin reaction on eggs.
1988 Schistosoma mansoni cationic egg antigens (CEF-6): Immunoserology with oxamniquine-treated patients and involvement of CEF6 in the circumoval precipitin reaction.
Precipitins in bird breeder's disease: how useful are they?
Key words: bird-breeder's lung, bird breeding, cockatiels, hypersensitivity pneumonitis, inspiratory squawk, lung, precipitin antibodies, respiratory sounds.
We chose to send the sample to an academic laboratory because typical commercial laboratories do not use a standardized panel of bird precipitin antibodies, which may lead to a falsely negative test and a missed diagnosis.
Multiple precipitins to cow's milk in chronic respiratory disease.