A positive correlation between the percentage of TG2-specific plasma cells and serum TG2 antibody levels (rS = 0.690, P < 0.001, Fig. 2a) as well as EmA (rS = 0.712, P < 0.001) was observed when data from all coeliac disease patient groups were included in the analysis. The gene discussed is TGM2; the disease is celiac disease.