    New chain ID            Original chain ID

6r83-pdb-bundle1.pdb:
           A                        1a
           B                        2a
           C                        3a
           D                        4a
           E                        5a
           F                        6a

6r83-pdb-bundle2.pdb:
           A                        7a
           B                        8a
           C                        9a
           D                       10a
