    New chain ID            Original chain ID

7zqb-pdb-bundle1.pdb:
           i                         i
           h                         h
           j                         j
           R                         R
           I                         I
           a                         a
           Q                         Q
           S                         S
           F                         F
           N                         N
           H                         H
           X                         X
           Y                         Y
           M                         M
           O                         O
           E                         E
           C                         C
           J                         J
           L                         L
           G                         G
           W                         W
           U                         U
           K                         K
           D                         D
           A                         A
           B                         B
           P                         P
           T                         T
           f                         f
           g                         g
           e                         e
           V                         V
           Z                         Z
           b                         b
           d                         d
           c                         c
