    New chain ID            Original chain ID

7o7y-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

7o7y-pdb-bundle2.pdb:
           A                        B5
           B                        B7
           C                        B8
           D                        BA

7o7y-pdb-bundle3.pdb:
           A                        BB
           B                        BC
           C                        BD
           D                        BE
           E                        BF
           F                        BG
           G                        BH
           H                        BI
           I                        BJ
           J                        BK
           K                        BL
           L                        BM
           M                        BN
           N                        BO
           O                        BP
           P                        BQ
           Q                        BR
           R                        BS
           S                        BT
           T                        BU
           U                        BV
           V                        BW
           W                        BX
           X                        BY
           Y                        BZ
           Z                        Ba
           a                        Bb
           b                        Bc
           c                        Bd
           d                        Be
           e                        Bf
           f                        Bg
           g                        Bh
           h                        Bi
           i                        Bj
           j                        Bk
           k                        Bl
           l                        Bm
           m                        Bo
           n                        Bp
           o                        Br
           p                        Bs
           q                        Bt
           r                        Bv
