    New chain ID            Original chain ID

9rot-pdb-bundle1.pdb:
           0                         0
           1                         1
           3                         3
           B                         B
           C                         C
           E                         E
           F                         F
           H                         H
           I                         I
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T
           U                         U
           W                         W
           X                         X
           Y                         Y
           Z                         Z
           D                         D
           G                         G
           J                         J
           V                         V
           4                         4
           b                         b

9rot-pdb-bundle2.pdb:
           A                         A
           7                         7
           a                         a
