Elevated levels of antibodies to NGP and DGP occurred in all CeD cases at diagnosis, but their serum concentrations did not correlate with those of anti-TG2 antibodies based on Pearson’s test (TG2 versus NGP r = 0.21 and TG2 versus DGP r = 0.16 for IgA, respectively; Supplementary Figure S3). Here, TGM2 is linked to cranioectodermal dysplasia.