    New chain ID            Original chain ID

9i5t-pdb-bundle1.pdb:
           A                         0
           B                         1
           C                        11
           D                        12
           E                         2
           F                         4
           G                         6
           H                         7
           I                         8
           J                         A
           K                         B
           L                         D
           M                         E
           N                         F
           O                         M
           P                         O
           Q                         P
           R                         Q
           S                         R
           T                         S
           U                         T
           V                         U
           W                         V
           X                         W
           Y                         X
           Z                         Y
           a                         Z
           b                         h
           c                        15
           d                        13
           e                         N
           f                         5
