    New chain ID            Original chain ID

6xu6-pdb-bundle1.pdb:
           A                        AA
           B                        CA
           C                        AB
           D                        CB
           E                        AC
           F                        CC
           G                        Ag
           H                        AU
           I                        AX
           J                        AM
           K                        Ad
           L                        AN
           M                        AL
           N                        AR
           O                        AP
           P                        AV
           Q                        AY
           R                        AZ
           S                        Aa
           T                        Ab
           U                        AD
           V                        Ae
           W                        Af
           X                        AJ
           Y                        Ca
           Z                        CN
           a                        CI
           b                        CD
           c                        CQ
           d                        CR
           e                        CS
           f                        CT
           g                        CP
           h                        CX
           i                        CY
           j                        CZ
           k                        Cr
           l                        Ch
           m                        Cb
           n                        Cc
           o                        Ce
           p                        Cf
           q                        Ci
           r                        Ck
           s                        Cl
           t                        Cm
           u                        Cn
           v                        Cp
           w                        Co
           x                        CJ
           y                        CH
           z                        CE
           0                        CG
           1                        A9
           2                        A7
           3                        A8
           4                        Cz

6xu6-pdb-bundle2.pdb:
           A                        B2

6xu6-pdb-bundle3.pdb:
           A                        A5
           B                        AE
           C                        AG
           D                        AH
           E                        AI
           F                        AQ
           G                        CO
           H                        CL
           I                        CV
           J                        CM
           K                        DA
           L                        AK
           M                        AT
           N                        AF
           O                        AO
           P                        Ac
           Q                        AW

6xu6-pdb-bundle4.pdb:
           A                        CW
           B                        Cg
           C                        CU
           D                        Cj
           E                        CF
           F                        Cd
           G                        AS
