    New chain ID            Original chain ID

4v5i-pdb-bundle1.pdb:
           A                        A0
           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                        B0
           c                        BA
           d                        BB
           e                        BC
           f                        BD
           g                        BE
           h                        BF
           i                        BG
           j                        BH
           k                        BI
           l                        BJ
           m                        BK
           n                        BL
           o                        BM
           p                        BN
           q                        BO
           r                        BP
           s                        BQ
           t                        BR

4v5i-pdb-bundle2.pdb:
           A                        BS
           B                        BT
           C                        BU
           D                        BV
           E                        BW
           F                        BX
           G                        BY
           H                        BZ
