<unk>  (ATA) are autoantibodies against the<unk>  protein. Antibodies serve an important role in the immune system by detecting cells and substances that the rest of the immune system then eliminates. These cells and substances can be foreign (for example, viruses) and also can be produced by the body (for example, cancer cells). Antibodies against the body's own products are called autoantibodies. Autoantibodies can sometimes errantly be directed against healthy portions of the organism, causing autoimmune diseases. ATA can be classified according to 2 different schemes:<unk>  isoform and immunoglobulin reactivity subclass (IgA, IgG) toward<unk> s.
Anti-transglutaminase antibodies
Anti-gliadin antibodies
Anti-malignin antibody
Anti-apolipoprotein antibodies
Antiganglioside antibodies
Anti-histone antibodies
Anti-LKM antibody
Anti–Saccharomyces cerevisiae antibody