    New chain ID            Original chain ID

4ujd-pdb-bundle1.pdb:
           A                        A2
           B                        A3
           C                        A4
           D                        AA
           E                        AB
           F                        AC
           G                        AD
           H                        AE
           I                        AF
           J                        AG

4ujd-pdb-bundle2.pdb:
           A                        AH
           B                        AI
           C                        AJ
           D                        AL
           E                        AM
           F                        AN
           G                        AO
           H                        AP
           I                        AQ
           J                        AR
           K                        AS
           L                        AT
           M                        AU
           N                        AV
           O                        AW
           P                        AX
           Q                        AY
           R                        AZ
           S                        Aa
           T                        Ab
           U                        Ac
           V                        Ad
           W                        Ae
           X                        Af
           Y                        Ag
           Z                        Ah
           a                        Ai
           b                        Aj
           c                        Ak
           d                        Al
           e                        Am
           f                        An
           g                        Ao
           h                        Ap
           i                        At
           j                        Au
           k                        BA
           l                        BB
           m                        BC
           n                        C1
           o                        CA
           p                        CB
           q                        CC
           r                        CD
           s                        CE
           t                        CF
           u                        CG

4ujd-pdb-bundle3.pdb:
           A                        CH
           B                        CI
           C                        CJ
           D                        CK
           E                        CL
           F                        CM
           G                        CN
           H                        CO
           I                        CP
           J                        CQ
           K                        CR
           L                        CS
           M                        CT
           N                        CU
           O                        CV
           P                        CW
           Q                        CX
           R                        CY
           S                        CZ
           T                        Ca
           U                        Cb
           V                        Cc
           W                        Cd
           X                        Ce
           Y                        Cf
           Z                        Cg
