    New chain ID            Original chain ID

6xu7-pdb-bundle1.pdb:
           A                        AA
           B                        CA
           C                        AB
           D                        CB
           E                        AC
           F                        CC
           G                        Ag
           H                        AU
           I                        AO
           J                        AX
           K                        AM
           L                        AS
           M                        Ad
           N                        AN
           O                        AL
           P                        AR
           Q                        AP
           R                        AV
           S                        AY
           T                        AZ
           U                        Aa
           V                        Ab
           W                        AD
           X                        Ae
           Y                        Af
           Z                        AJ
           a                        Ca
           b                        CN
           c                        CI
           d                        CD
           e                        CQ
           f                        CR
           g                        CS
           h                        CT
           i                        CP
           j                        CX
           k                        CY
           l                        CZ
           m                        Cr
           n                        Ch
           o                        Cb
           p                        Cc
           q                        Cd
           r                        Ce
           s                        Cf
           t                        Ci
           u                        Ck
           v                        Cl
           w                        Cm
           x                        Cn
           y                        Cp
           z                        Co
           0                        CJ
           1                        CH
           2                        CE
           3                        CG
           4                        A9
           5                        A7
           6                        A8
           7                        Cz

6xu7-pdb-bundle2.pdb:
           A                        B2

6xu7-pdb-bundle3.pdb:
           A                        A5
           B                        Ac
           C                        AW
           D                        CW
           E                        Cg
           F                        CU
           G                        AK
           H                        AT
           I                        AF
           J                        CF
           K                        AE
           L                        AG
           M                        AH
           N                        AI
           O                        AQ
           P                        CO
           Q                        CL
           R                        CV

6xu7-pdb-bundle4.pdb:
           A                        CM
           B                         B
           C                         v
           D                        Cj
