    New chain ID            Original chain ID

9oac-pdb-bundle1.pdb:
           A                        Aa
           B                        Ab
           C                        Ac
           D                        Ad
           E                        Ae
           F                        Af
           G                        Ag
           H                        Ah
           I                        Ai
           J                        Aj
           K                        Ak
           L                        Al
           M                        Am
           N                        An
           O                        Ao
           P                        Ap
           Q                        Aq
           R                        Ar
           S                        As
           T                        At
           U                        Ba
           V                        Bb
           W                        Bc
           X                        Bd
           Y                        Be
           Z                        Bf
           a                        Bg
           b                        Bh
           c                        Bi
           d                        Bj
           e                        Bk
           f                        Bl
           g                        Bm
           h                        Bn
           i                        Bo
           j                        Bp
           k                        Bq
           l                        Br
           m                        Bs
           n                        Bt
           o                        Ca
           p                        Cb
           q                        Cc
           r                        Cd
           s                        Ce
           t                        Ja
           u                        Jb
           v                        Jc
           w                        Jd
           x                        Je
           y                        Jf
           z                        Jg
           0                        Jh
           1                        Ji
           2                        Jj
