    New chain ID            Original chain ID

9l5s-pdb-bundle1.pdb:
           A                         2
           B                         5
           C                         6
           D                         A
           E                         B
           F                         C
           G                         E
           H                         F
           I                         I
           J                         J
           K                         L
           L                         K
           M                         q
           N                         t
           O                         r
           P                         s
           Q                         N
           R                         S
           S                         T
           T                         M
           U                         0
           V                         R
           W                         W
           X                         P
           Y                         Y
           Z                         1
           a                         z
           b                         j
           c                         k
           d                         l
           e                         m
           f                         o
           g                         p
           h                         u
           i                         V
           j                         Z
           k                        CY
           l                        Ck
           m                        Cb
           n                         8
           o                        CV
