    New chain ID            Original chain ID

9x17-pdb-bundle1.pdb:
           A                        BC
           B                        BD
           C                        BE
           D                        BG
           E                        BI
           F                        BK
           G                        BL
           H                        BN
           I                        BO
           J                        BP
           K                        BQ
           L                        BS
           M                        BU
           N                        BW
           O                        BX
           P                        CB
           Q                        CC
           R                        CD
           S                        AB
           T                        CE
           U                        CG
           V                        CI
           W                        CK
           X                        CL
           Y                        CN
           Z                        CO
           a                        CP
           b                        CQ
           c                        CS
           d                        CU
           e                        CW
           f                        CX
           g                        DB
           h                        DC
           i                        DD
           j                        DE
           k                        AC
           l                        DG
           m                        DI
           n                        DK
           o                        DL
           p                        AD
           q                        AE
           r                        AG
           s                        AI
           t                        AK
           u                        AL
           v                        AN
           w                        AO
           x                        AP
           y                        AQ
           z                        AS
           0                        AU
           1                        AW

9x17-pdb-bundle2.pdb:
           A                        AX
           B                        BB
