    New chain ID            Original chain ID

8oip-pdb-bundle1.pdb:
           A                        BX
           B                        Bd
           C                        AA
           D                        AB
           E                        AC
           F                        AD
           G                        AE
           H                        AF
           I                        AG
           J                        AH
           K                        AI
           L                        AJ
           M                        AK
           N                        AL
           O                        AM
           P                        AN
           Q                        AO
           R                        AP
           S                        AQ
           T                        AR
           U                        AS
           V                        AT
           W                        AU
           X                        AV
           Y                        AW
           Z                        AX
           a                        AY
           b                        AZ
           c                        Aa
           d                        Ab
           e                        Ac
           f                        Ad
           g                        Ae
           h                        Ag
           i                        Ai
           j                        Aj
