    New chain ID            Original chain ID

9o4h-pdb-bundle1.pdb:
           A                         A
           B                        AB
           C                        BB
           D                        CB
           E                        DB
           F                        EB
           G                        FB
           H                        GB
           I                        HB
           J                        IB
           K                        JB
           L                        KB
           M                        LB
           N                        MB
           O                        NB
           P                        OB
           Q                         B
           R                         C
           S                         D
           T                         E
           U                         F
           V                         G
           W                         H
           X                         I
           Y                         J
           Z                         K
           a                         L
           b                         M
           c                         N
           d                         O
           e                         a
           f                        ab
           g                        bb
           h                        cb
           i                        db
           j                        eb
           k                        fb
           l                        gb
           m                        hb
           n                        ib
           o                        jb
           p                        kb
           q                        lb
           r                        mb
           s                        nb
           t                        ob
           u                         b
           v                         c
           w                         d
           x                         e
           y                         f
           z                         g
           0                         h
           1                         i
           2                         j
           3                         k
           4                         l
           5                         m
           6                         n
           7                         o
