    New chain ID            Original chain ID

9mcg-pdb-bundle1.pdb:
           A                        AA
           B                        AB
           C                        AC
           D                        AD
           E                        AE
           F                        BA
           G                        BB
           H                        BC
           I                        BD
           J                        BE
           K                        BF
           L                        BG
           M                        BH
           N                        BI
           O                        BJ
           P                        BK
           Q                        BL
           R                        CA
           S                        CB
           T                        CC
           U                        CD
           V                        CE
           W                        CF
           X                        CG
           Y                        CH
           Z                        CI
           a                        CJ
           b                        CK
           c                        DA
           d                        DB
           e                        DC

9mcg-pdb-bundle2.pdb:
           A                        DD
           B                        DE
           C                        DF
           D                        DG
           E                        DH
           F                        DI
           G                        DJ
           H                        DK
           I                        EA
           J                        EB
           K                        EC
           L                        ED
           M                        EE
           N                        EF
           O                        EG
           P                        EH
           Q                        EI
           R                        EJ
           S                        EK
           T                        FA
           U                        FB
           V                        FC
           W                        FD
           X                        FE
           Y                        FF
           Z                        FG
           a                        FH
           b                        FI
           c                        FJ
           d                        FK
           e                        GA
           f                        GB
           g                        GC

9mcg-pdb-bundle3.pdb:
           A                        GD
           B                        GE
           C                        GF
           D                        GG
           E                        GH
           F                        GI
           G                        GJ
           H                        GK
