Identification of MHC II-bound peptides. (A) Representation of several endogenous proteins processed and presented on MHC II molecules isolated from ADAMTS13-treated mDCs of donor 4 (DRB1*1101/DRB1*1301). (B) List of ADAMTS13-derived peptides presented on MHC II of donor 4. The first column shows the amino acid sequence of the peptides derived from ADAMTS13. Following are the rank, charge, and X_corr value as provided by Sequest. Peptides meeting the required rank and cross-correlation criteria as documented in “Material and methods” are indicated by a green dot.