    New chain ID            Original chain ID

4v47-pdb-bundle1.pdb:
           A                        A0
           B                        A9
           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                        AQ
           S                        AR
           T                        AS
           U                        AT
           V                        AU
           W                        AW
           X                        AX
           Y                        AZ
           Z                        A1
           a                        A4
           b                        BA
           c                        BC
           d                        BD
           e                        BE
           f                        BF
           g                        BG
           h                        BH
           i                        BI
           j                        BJ
           k                        BK
           l                        BL
           m                        BM
           n                        BN
           o                        BO
           p                        BP
           q                        BQ
           r                        BR
           s                        BS
           t                        BT
