immunoglobulin A


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immunoglobulin A

n. Abbr. IgA
1. The class of antibodies found predominantly in body secretions such as saliva, tears, breast milk, and mucous secretions of the gastrointestinal and respiratory tracts, functioning to prevent attachment of viruses and bacteria to epithelial surfaces and to neutralize toxins.
2. An antibody of this class.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.immunoglobulin A - one of the most common of the five major classes of immunoglobulins; the chief antibody in the membranes of the gastrointestinal and respiratory tracts
Ig, immune gamma globulin, immune globulin, immune serum globulin, immunoglobulin - a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response
References in periodicals archive ?
The cartridges use affinity-purified polyclonal antibodies to remove more than 98 percent of the six most abundant proteins (albumin, immunoglobulin G, immunoglobulin A, alpha-1-antitrypsin, transferrin and haptoglobin) in human serum and the three most abundant proteins (albumin, immunoglobulin G and transferrin) in mouse serum, with minimal non-specific removal of other proteins.
Food and Drug Administration has approved immunoglobulin as an intravenous or intramuscular injection for temporary resistance against hepatitis A, measles and varicella-zoster infections.
Food and Drug Administration has approved the use of immunoglobulin as an intravenous or intramuscular injection for temporary resistance against hepatitis A, measles and varicella-zoster infections.