text_1: IgA plasma cells that are specific for transglutaminase 2 accumulate in the duodenal mucosa on commencement of a gluten-free diet.
text_2: TG2-specific antibodies did not block enzymatic activity and served as substrates for TG2-mediated crosslinking when expressed as IgD or IgM but not as IgA1 or IgG1.