The hydrogen bonds and the salt bridges between DRA/DRB chains and the peptide in both structures.

Columns ‘Molecule 1’/‘Residue’ 1 list the α or β chain of each DR complex (column ‘Molecule 1’) and the residues that interact with the peptide (column Residue 1). Column ‘Molecule 2’ refers always to the peptide. In column ‘Residue 2’ the peptide’s residues that form H-bonds and salt bridges with any DR-complex amino acid are listed. The atoms involved are shown.