    New chain ID            Original chain ID

8tv9-pdb-bundle1.pdb:
           A                         a
           B                        AA
           C                        AB
           D                        AC
           E                        AD
           F                        AE
           G                        AF
           H                        AG
           I                        AH
           J                        AI
           K                        AJ
           L                        AK
           M                        AL
           N                        AM
           O                        AN
           P                        AO
           Q                        AP
           R                        AQ
           S                        AR
           T                        AS
           U                        AT
           V                        AU
           W                        AV
           X                        AW
           Y                        AX
           Z                        AY
           a                        AZ
           b                        BA
           c                        BB
           d                        BC
           e                        BD
           f                        BE
           g                        BF
           h                        BG
           i                        BH
           j                        BI
           k                        BJ
