PDB entry 1N2R contains the proteins listed below.

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HLA class II histocompatibility antigen DP alpha chain (Q95HB9) UniProt residues in chain C: 77 - 85 View details
Beta-2-microglobulin (P61769) UniProt residues in chain B: 21 - 119 View details
HLA class I histocompatibility antigen, B alpha chain (P01889) UniProt residues in chain A: 25 - 300 View details