    New chain ID            Original chain ID

8xp1-pdb-bundle1.pdb:
           A                         0
           B                         C
           C                         S
           D                         Z
           E                         h
           F                         o
           G                         u
           H                        AA
           I                         D
           J                         T
           K                         a
           L                         i
           M                         p
           N                         v
           O                        AB
           P                         E
           Q                         U
           R                         b
           S                         j
           T                         q
           U                         w
