    New chain ID            Original chain ID

7oyd_1-pdb-bundle1.pdb:
           A                         x
           B                         A
           C                        AA
           D                        Aa
           E                         B
           F                        BB
           G                        Bb
           H                         C
           I                        CC
           J                        Cc
           K                         D
           L                        DD
           M                        Dd
           N                         E
           O                        EE
           P                        Ee
           Q                         F
           R                        FF
           S                         G
           T                        GG
           U                        Gg
           V                         H
           W                        HH
           X                         I
           Y                        II
           Z                         J
           a                        JJ
           b                        KK
           c                         L
           d                        LL
           e                         M
           f                         N
           g                        NN
           h                         O
           i                        OO
           j                         P
           k                        PP
           l                         Q
           m                        QQ
           n                         R
           o                        RR
           p                         S
           q                        SS
           r                         T
           s                        TT
           t                         U
           u                        UU
           v                         V
           w                        VV
           x                         W
           y                        WW
           z                         X
           0                        XX
           1                         Y
           2                        YY
           3                         Z
           4                        ZZ
           5                         a
           6                         b
           7                         c
           8                         d
           9                         e
7oyd_1-pdb-bundle2.pdb:
           A                         f
           B                         g
           C                         h
           D                         i
           E                         j
           F                         k
           G                         l
           H                         m
           I                         o
           J                         p
           K                         r
           L                         s
           M                         t
           N                         v
           O                         w
