    New chain ID            Original chain ID

4v48-pdb-bundle1.pdb:
           A                        A0
           B                        A9
           C                        A6
           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                        AQ
           T                        AR
           U                        AS
           V                        AT
           W                        AU
           X                        AW
           Y                        AX
           Z                        AZ
           a                        A1
           b                        A4
           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
           u                        BS
           v                        BT
