    New chain ID            Original chain ID

9xtt-pdb-bundle1.pdb:
           A                         0
           B                         1
           C                         2
           D                         4
           E                         5
           F                         6
           G                         A
           H                         B
           I                         C
           J                         D
           K                         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                         X
           d                        X1
           e                        X2
           f                        X3
           g                         Y

9xtt-pdb-bundle2.pdb:
           Z                         Z
           a                         a
           b                         b
           c                         c
           d                         d
           e                         e
           f                         f
           g                         g
           h                         h
           i                         i
           j                         j
           k                         k
           l                         l
           m                         m
           n                         n
           q                         q
           r                         r
           s                         s
           t                         t
           u                         u
           v                         v
           w                         w
           x                         x
           z                         z
