Box 3 | Towards directly approaching the peptide-MHC ligandome of thymic stromal cells Amazingly, one of the first attempts in early 1990’s to assess the peptide (p)MHC ligandome by peptide-elution and -sequencing reported an evaluation between cTECs and splenic APCs 112 . At the time, merely 17 of the most extremely plentiful home peptides were […]