    New chain ID            Original chain ID

9sum_1-pdb-bundle1.pdb:
           A                         D
           B                         E
           C                         F
           D                         G
           E                         H
           F                         I
           G                         J
           H                         K
           I                         L
           J                         M
           K                         N
           L                         O
           M                         P
           N                         Q
           O                         R
           P                         S
           Q                         T
           R                         U
           S                         V
           T                         W
           U                         X
           V                         Y
           W                         Z
           X                        ZA
           Y                        ZB
           Z                        ZC
           a                        ZD
           b                        ZE
           c                        ZF
           d                        ZG
           e                        ZH
           f                        ZI
           g                        ZJ
           h                        ZK
           i                        ZL
           j                        ZM
           k                        ZO
           l                        ZP
           m                        ZQ
           n                        ZR
           o                        ZS
           p                        ZT
           q                        ZU
           r                        ZV
           s                        ZW
           t                        ZY
           u                         a
           v                         b
           w                         c
           x                         d
           y                         e
           z                         f
           0                         g
           1                         h
           2                         i
           3                         j
           4                         k
           5                         l
           6                         m
           7                         n
           8                         o
           9                         q
9sum_1-pdb-bundle2.pdb:
           A                         r
           B                         s
           C                         t
           D                         u
           E                         v
           F                         w
           G                         x
           H                         y
           I                         z
