    New chain ID            Original chain ID

9i5x-pdb-bundle1.pdb:
           p                         p
           0                         0
           1                         1
           2                         2
           4                         4
           5                         5
           6                         6
           7                         7
           8                         8
           A                         A
           B                         B
           D                         D
           E                         E
           F                         F
           K                         K
           L                         L
           M                         M
           N                         N
           O                         O
           P                         P
           Q                         Q
           R                         R
           S                         S
           T                         T
           U                         U
           V                         V
           W                         W
           X                         X
           Z                         Z

9i5x-pdb-bundle2.pdb:
           A                         a
           B                         b
           C                         c
           D                         d
           E                         e
           F                         f
           G                         g
           H                         h
           I                         i
           J                         j
           K                         k
           L                         l
           M                         m
           N                         n
           O                         Y
           P                         o
           Q                        10
           R                         J
           S                         I
