IAg7-based pMHCs displaying two such epitopes (PDC-E2166–181 and PDC-E282–96) or a negative control peptide (the T1D-relevant BDC2.5 mimotope) were purified from culture supernatants of transgenic CHO cells and coated onto functionalized iron-oxide NPs or used to produce pMHC tetramers1,2. The gene discussed is PDC; the disease is type 1 diabetes mellitus.