(redirected from Precipitins)
Also found in: Thesaurus, Medical, Encyclopedia.


An antibody that reacts with a specific soluble antigen to produce a precipitate.


(Biochemistry) immunol an antibody that causes precipitation when mixed with its specific antigen


(prɪˈsɪp ɪ tɪn)

an antibody that reacts with an antigen to form a precipitate.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.precipitin - an antibody that causes precipitation when it unites with its antigen
antibody - any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response
Mentioned in ?
References in periodicals archive ?
Some diagnostic criteria have been described to consider a primary cutaneous compromise (30): absence of pulmonary disease history, clear history of traumatic inoculation, short incubation period (1-3 weeks) previous to the onset of the symptoms, initial chancriform lesion (nodule o asymptomatic plaque, indurated with central ulceration), lymphadenopathy or lymphadenitis, positive precipitins, initial positive coccodiodin skin test, and negative complement fixation titers, with posterior positive very low titers, and spontaneous healing in a few weeks in immunocompetent patients.
Cricket proteins were extracted and high titer antibodies were found against the extract with specific antigen-antibody precipitins.
These comprise Total IgE (3500/annum), ~Specific Allergens (24,000 tests/annum utilising approx 100 of the most common individual allergens), Avian Precipitins (2000/annum) and Tryptase (500/annum).
Keys to the diagnosis of hypersensitivity pneumonitis: the role of serum precipitins, lung biopsy, and high-resolution computed tomography.
The cps locus from the prototype serogroup D isolates deposited by Gordon and Murray in 1917 and Branham in 1928 also contained serogroup C-specific capsule genes; however, neither isolate gave precipitins with antiserum to serogroup C, suggesting that these isolates were unencapsulated (C.
17) Likewise, asymptomatic farmers may exhibit serum precipitins.