precipitin


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Related to precipitin: precipitin test

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 ?
In fact, our patient showed definite positive precipitins to cockatiel antigen, as well as a definite positive reaction to pigeon sera and very weakly positive precipitin reactions to droppings extracts of pigeons, canaries, and parakeets.
After incubation, the precipitin arcs were stained in the usual manner.
receiving treatment, scored by agar gel precipitin or hemagglutination inhibition tests.
The abnormal precipitin arcs for albumin disappeared when antisera specific for human albumin or IgA ([alpha]-chain specific) were incubated for 37[degrees]C for 30 min with the purified IgA-type M-protein (at a ratio of 6:1 by volume) and supernates were concentrated by ultrafiltration.
Preinoculation serum was collected from each bird to confirm they were serologically naive to influenza A viral antigens by agar gel precipitin test (AGP) and to H5 influenza by specific hemagglutination inhibition (HI) testing by using standard procedures (11).
Two precipitin bands were observed against mouse serum, and a single band was observed against mouse IgG (cat.
An immunodiffusion test as a substitute for the tube precipitin test.
The results of immunological tests were as follows: rheumatoid factor <1/20 IU/mL (upper reference limit <1/40); antinuclear antibody titer positive at 1:2560 (upper reference limit <1/80) with a speckled pattern; antibodies to extractable nuclear antigens positive with an unidentified precipitin line.
Patient's serum sample and sera from known C-CHF-positive patients, as well as hyperimmune human gamma globulin against C-CHFV, were placed in the wells in agar plates and left overnight to diffuse; precipitin lines were formed where the concentration of the antigen and antibodies was serologically equivalent (3).
Anti-antiserum antibody as a cause of double precipitin rings in immunoglobulin quantitation and its relation to milk precipitins.
The precipitin test was used to type blood in the intestinal contents of 44 adult male and female triatomines.
The precipitin antibodies are made specific by absorption of the serum with streptococcal cells to remove the carbohydrate group antibodies and any cross-reactive precipitin antibody to heterologous M-type strains.