    New chain ID            Original chain ID

9bcx-pdb-bundle1.pdb:
           2                         2
           3                         3
           5                         5
           4                         4
           6                         6
           7                         7
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F
           G                         G
           I                         I
           8                         8
           O                         O
           P                         P
