    New chain ID            Original chain ID

5xth-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         E
           E                         F
           F                         G
           G                         H
           H                         I
           I                         J
           J                         K
           K                         L
           L                         M
           M                         N
           N                         O
           O                         P
           P                         Q
           Q                         S
           R                         T
           S                         U
           T                         V
           U                         W
           V                         X
           W                         Y
           X                         Z
           Y                         a
           Z                         b
           a                         c
           b                         d
           c                         e
           d                         f
           e                         g
           f                         h
           g                         i
           h                         j
           i                         k
           j                         l
           k                         m
           l                         n
           m                         o
           n                         p
           o                         r
           p                         s
           q                         u
           r                         v
           s                         w
           t                         x
           u                         y
           v                         z
           w                         0
           x                         1
           y                         2
           z                         3
           0                         4
           1                         5
           2                         6
           3                         7
           4                         8
           5                         9
           6                        AA
           7                        AB
           8                        AC
           9                        AD

5xth-pdb-bundle2.pdb:
           A                        AE
           B                        AF
           C                        AG
           D                        AH
           E                        AJ
           F                        AK
           G                        AL
           H                        AN
           I                        AO
           J                        AP
           K                        AQ
           L                        AR
           M                        AS
           N                        AT
           O                        AU
           P                        AV
           Q                        AW
           R                        AY
