    New chain ID            Original chain ID

9byr-pdb-bundle1.pdb:
           N                         N
           M                         M
           n                         n
           L                         L
           l                         l
           O                         O
           o                         o
           K                         K
           k                         k
           P                         P
           p                         p
           J                         J
           j                         j
           Q                         Q
           q                         q
           I                         I
           i                         i
           R                         R
           r                         r
           H                         H
           h                         h
           S                         S
           s                         s
           G                         G
           g                         g

9byr-pdb-bundle2.pdb:
           T                         T
           t                         t
           F                         F
           f                         f
           U                         U
           u                         u
           E                         E
           e                         e
           V                         V
           v                         v
           D                         D
           d                         d
           W                         W
           w                         w
           C                         C
           c                         c
           X                         X
           x                         x
           B                         B
           A                         A
           b                         b
