    New chain ID            Original chain ID

4v9g-pdb-bundle1.pdb:
           A                        A5
           B                        AT
           C                        AV
           D                        AX
           E                        A3
           F                        A7
           G                        AD
           H                        AF
           I                        A1
           J                        AJ
           K                        A2
           L                        AN
           M                        AP
           N                        AZ
           O                        AB
           P                        AS
           Q                        A9
           R                        AO
           S                        AQ
           T                        A6
           U                        AU
           V                        AW
           W                        AY
           X                        A4
           Y                        A8
           Z                        AE
           a                        AG
           b                        AI
           c                        AK
           d                        AH
           e                        AL
           f                        AM
           g                        B5
           h                        BT
           i                        BV
           j                        BX
           k                        B3
           l                        B7
           m                        BD
           n                        BF
           o                        B1
           p                        BJ
           q                        B2
           r                        BN
           s                        BP
           t                        BZ
           u                        BB
           v                        BS
           w                        B9
           x                        BO
           y                        BQ
           z                        B6
           0                        BU
           1                        BW
           2                        BY
           3                        B4
           4                        B8
           5                        BE
           6                        BG
           7                        BI
           8                        BK
           9                        BH

4v9g-pdb-bundle2.pdb:
           A                        BL
           B                        BM
