Using mass spec analyses of peptides eluted from the RA-associated DRB1*01:01, DRB1*04:01 and DRB1*10:01 alleles, as well as non-RA associated alleles, Scholz et al. [60] found some sequence patterns common to peptides bound to the RA-associated alleles, but not present in the non-RA-associated repertoire. Here, HLA-DRB1 is linked to rheumatoid arthritis.