Noun
one of the most common of the five major classes of immunoglobulins; the chief antibody in the membranes of the gastrointestinal and respiratory tracts
Source: WordNetImmunoglobulin A (IgA) deposits against transglutaminase 2 (TG2) in the small bowel and at extraintestinal sites are proving to be additionally reliable and perhaps more specific markers of the whole spectrum of gluten sensitivity. Source: Internet