    New chain ID            Original chain ID

9m7b-pdb-bundle1.pdb:
           A                        DA
           B                        DB
           C                        DC
           D                        DD
           E                        DE
           F                        DF
           G                        DG
           H                        DH
           I                        DI
           J                        DJ
           K                        DK
           L                        EA
           M                        EB
           N                        EC
           O                        ED
           P                        EE
           Q                        EF
           R                        EG
           S                        EH
           T                        EI
           U                        EJ
           V                        EK
           W                        FA
           X                        FB
           Y                        FC
           Z                        FD
           a                        FE
           b                        FF
           c                        FG
           d                        FH
           e                        FI
           f                        FJ
           g                        FK

9m7b-pdb-bundle2.pdb:
           A                        GA
           B                        GB
           C                        GC
           D                        GD
           E                        GE
           F                        GF
           G                        GG
           H                        GH
           I                        GI
           J                        GJ
           K                        GK
           L                        HA
           M                        HB
           N                        HC
           O                        HD
           P                        HE
           Q                        HF
           R                        HG
           S                        HH
           T                        HI
           U                        HJ
           V                        HK
           W                        IA
           X                        IB
           Y                        IC
           Z                        ID
           a                        IE
           b                        IF
           c                        IG
           d                        IH
           e                        II
           f                        IJ
           g                        IK
