Human leukocyte antigens (HLA) have long been grouped into supertypes to facilitate peptide‐based immunotherapy. Analysis of several hundreds of peptides presented by all nine antigens of the HLA‐B44 supertype (HLA‐B * 18, B * 37, B * 40, B * 41, B * 44, B * 45, B * 47, B * 49 and B * 50) reveale…