List of H-2D^b ligands available at PDB.

Thirty-three files containing H-2Db alleles were found in PDB, 28 (*) presented different epitopes. These 28 epitopes were used at structure and sequence analyses. 1FFO presents an MHC interacting with the TCR. Since this interaction could affect the conformation of the epitope, this structure was excluded. Structures presenting incomplete epitope sequence have been also excluded (e.g. 2CII). 1BZ9 epitope was included in all analyses, however it was excluded in Figure 1 and Figure 1SB.