    New chain ID            Original chain ID

7o7z-pdb-bundle1.pdb:
           A                        A2
           B                        AA
           C                        AB
           D                        AC
           E                        AD
           F                        AE
           G                        AF
           H                        AG
           I                        AH
           J                        AI
           K                        AT
           L                        AZ
           M                        Aa
           N                        Ab
           O                        Ac
           P                        Ad
           Q                        Ae
           R                        Af
           S                        Ag
           T                        Ah
           U                        Ai
           V                        Aj
           W                        Ak
           X                        Al
           Y                        Am
           Z                        An
           a                        Ao
           b                        Ap
           c                        Aq
           d                        Ar
           e                        As
           f                        At
           g                        Au
           h                        Av
           i                        Aw
           j                        Ax
           k                        Ay
           l                        Az

7o7z-pdb-bundle2.pdb:
           A                        B5
           B                        B7
           C                        B8
           D                        BA
           E                        BB
           F                        BC
           G                        BD

7o7z-pdb-bundle3.pdb:
           A                        BE
           B                        BF
           C                        BG
           D                        BH
           E                        BI
           F                        BJ
           G                        BK
           H                        BL
           I                        BM
           J                        BN
           K                        BO
           L                        BP
           M                        BQ
           N                        BR
           O                        BS
           P                        BT
           Q                        BU
           R                        BV
           S                        BW
           T                        BX
           U                        BY
           V                        BZ
           W                        Ba
           X                        Bb
           Y                        Bc
           Z                        Bd
           a                        Be
           b                        Bf
           c                        Bg
           d                        Bh
           e                        Bi
           f                        Bj
           g                        Bk
           h                        Bl
           i                        Bm
           j                        Bo
           k                        Bp
           l                        Br
           m                        Bs
           n                        Bt
           o                        Bv
