Anti–HLA-E Abs and HLA Ia reactivity of anti–HLA-E Abs in IVIg (IVIGlob EX) before (untreated) and after adsorption to HLA-E conjugated Sephadex column. Loss of anti–HLA-E Abs after adsorption (A). Loss of HLA-Ia reactivity after adsorption (*) of anti–HLA-E Abs from IVIg (B).