C.I. 1.30-1.54) the level of ARHGAP24 than all other alleles. These alleles are associated with autoimmune disease susceptibility, as is HLA-DRB4 (defining the DR53 antigen)39,40. Our study shows that specifically monocytes from individuals with HLA-DRB4 have significantly reduced AOAH expression, a protein with anti-inflammatory properties, in tandem with increased expression of ARHGAP24.