    New chain ID            Original chain ID

4v7h-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        AG
           G                        AH
           H                        AI
           I                        AJ
           J                        AK
           K                        AL
           L                        AM
           M                        AN
           N                        AO
           O                        AQ
           P                        AS
           Q                        AR
           R                        AT
           S                        A7
           T                        B0
           U                        B1
           V                        B2
           W                        B8
           X                        B9
           Y                        BA
           Z                        BB
           a                        BC
           b                        BD
           c                        BE
           d                        BF
           e                        BG
           f                        BH
           g                        BI
           h                        BJ
           i                        BK
           j                        BL
           k                        BM
           l                        BN
           m                        BO
           n                        BP
           o                        BQ
           p                        BR
           q                        BS
           r                        BT
           s                        BU
           t                        BV
           u                        BW
           v                        BX
           w                        BY
           x                        BZ
           y                        B3
           z                        B4

4v7h-pdb-bundle2.pdb:
           A                        B5
