    New chain ID            Original chain ID

8btk-pdb-bundle1.pdb:
           A                        B5
           B                        B7
           C                        B8
           D                        BA
           E                        BB
           F                        BC
           G                        BD
           H                        BE

8btk-pdb-bundle2.pdb:
           A                        BF
           B                        BG
           C                        BH
           D                        BI
           E                        BJ
           F                        BK
           G                        BL
           H                        BM
           I                        BN
           J                        BO
           K                        BP
           L                        BQ
           M                        BR
           N                        BS
           O                        BT
           P                        BU
           Q                        BV
           R                        BW
           S                        BX
           T                        BY
           U                        BZ
           V                        Ba
           W                        Bb
           X                        Bc
           Y                        Bd
           Z                        Be
           a                        Bf
           b                        Bg
           c                        Bh
           d                        Bi
           e                        Bj
           f                        Bk
           g                        Bl
           h                        Bm
           i                        Bo
           j                        Bp
           k                        Br
           l                        Bs
           m                        Bt
           n                        Bv
           o                        SX
           p                        SY
           q                        SZ
           r                        A2
           s                        AA
           t                        AB
           u                        AC
           v                        AD
           w                        AE
           x                        AF
           y                        AG
           z                        AH
           0                        AT
           1                        AZ
           2                        Aa

8btk-pdb-bundle3.pdb:
           A                        Ab
           B                        Ac
           C                        Ad
           D                        Ae
           E                        Af
           F                        Ag
           G                        Ah
           H                        Ai
           I                        Aj
           J                        Ak
           K                        Al
           L                        Am
           M                        An
           N                        Ao
           O                        Ap
           P                        Aq
           Q                        Ar
           R                        As
           S                        At
           T                        Au
           U                        Av
           V                        Aw
           W                        Ax
           X                        Ay
           Y                        Az
           Z                        TA
           a                        TB
           b                        TC
           c                        TD
