TGM2 and celiac disease: Several antibodies are found in the serum of patients with celiac disease, including anti-gliadin antibodies (anti-AGAs), anti-deamidated gliadin peptide antibodies (anti-DGPs), anti-transglutaminase 2 antibodies (anti-TG2s), anti-R1-type reticulin antibodies (anti-ARAs), and anti-endomysia antibodies (anti-EMAs) [97].