    New chain ID            Original chain ID

9vfj-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F
           G                         J
           H                         M
           I                         1
           J                         2
           K                         3
           L                         4
           M                         5
           N                         6
           O                         7
           P                         8
           Q                         9
           R                        10
           S                        11
           T                        12
           U                        13
