    New chain ID            Original chain ID

8z5w-pdb-bundle1.pdb:
           A                         0
           B                         9
           C                         A
           D                        AA
           E                        AB
           F                        AC
           G                        AD
           H                        AE
           I                        AF
           J                        AG
           K                        AH
           L                        AI
           M                        AJ
           N                        AK
           O                        AL
           P                        AM
           Q                        AN
           R                        AO
           S                         B
           T                         C
           U                        AP
           V                        AQ
           W                        AR
           X                         b
           Y                         c
           Z                         d
           a                         e
           b                         f
           c                         g
           d                         h
           e                         i
           f                         j
           g                         k
           h                         l
           i                         m
           j                         n
           k                         o
           l                         p
           m                         q
