    New chain ID            Original chain ID

6r6p-pdb-bundle1.pdb:
           5                         5
           7                         7
           8                         8
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                         F

6r6p-pdb-bundle2.pdb:
           A                         G
           B                         H
           C                         I
           D                         J
           E                         L
           F                         M
           G                         N
           H                         O
           I                         P
           J                         Q
           K                         R
           L                         S
           M                         T
           N                         U
           O                         V
           P                         W
           Q                         X
           R                         Y
           S                         Z
           T                         a
           U                         b
           V                         c
           W                         d
           X                         e
           Y                         f
           Z                         g
           a                         h
           b                         i
           c                         j
           d                         k
           e                         l
           f                         m
           g                         n
           h                         o
           i                         p
           j                         r
           k                         s
           l                         t
           m                         1
           n                         2
           o                         3
           p                         K
           q                         q
           r                         u
           s                         v
           t                         x
           u                         z
           v                         y
           w                        CC
           x                        XX
           y                        EE
           z                        QQ
           0                        MM
           1                        UU

6r6p-pdb-bundle3.pdb:
           A                        YY
           B                        HH
           C                        TT
           D                        VV
           E                        NN
           F                        ZZ
           G                        JJ
           H                        AA
           I                        DD
           J                        BB
           K                        SS
           L                        RR
           M                         9
           N                        II
           O                        PP
           P                        GG
           Q                        OO
           R                        FF
           S                         w
           T                         0
           U                         6
           V                         4
