    New chain ID            Original chain ID

9b7q-pdb-bundle1.pdb:
           A                         A
           H                         H
           L                         L
           h                         h
           l                         l
           1                         1
           2                         2
           3                         3
           4                         4
           5                         5
           6                         6
           B                         B
           C                         C
           D                         D
           E                         E
