    New chain ID            Original chain ID

9rcd_1-pdb-bundle1.pdb:
           A                         1
           B                         2
           C                         3
           D                         A
           E                         B
           F                         C
           G                         D
           H                         E
           I                         F
           J                         G
           K                         H
           L                         I
           M                         J
           N                         K
           O                         L
           P                         M
           Q                         N
           R                         O
           S                         P
           T                         Q
           U                         R
           V                         S
           W                         T
           X                         U
           Y                         V
           Z                         c
           a                         h
           b                         i
           c                         j
           d                         k
           e                         l
           f                         m
           g                         n
           h                         o
           i                         p
           j                         q
9rcd_1-pdb-bundle2.pdb:
           A                         q
           B                         r
           C                         s
           D                         t
           E                         u
           F                         v
           G                         w
           H                         x
           I                         z
