    New chain ID            Original chain ID

9g6v-pdb-bundle1.pdb:
           1                         1
           2                         2
           3                         3
           B                         B
           D                         D
           F                         F
           H                         H
           J                         J
           L                         L
           N                         N
           P                         P
           A                         A
           E                         E
           I                         I
           M                         M
           Q                         Q
           C                         C
           G                         G
           K                         K
           O                         O
