    New chain ID            Original chain ID

8r0a-pdb-bundle1.pdb:
           A                         5
           B                         C
           C                         D
           D                         E
           E                         F
           F                         M
           G                         R
           H                         U
           I                         X
           J                         Z
           K                         z
           L                         A
           M                         B
           N                         2
           O                         4
           P                         6
           Q                         7
           R                         8
           S                        B4
           T                         9
           U                        B2
           V                        B5
           W                        B3
           X                        BP
           Y                        B1
           Z                        B6
           a                        22
           b                        2B
           c                        2f
           d                        2b
           e                        23
           f                        2g
           g                        2e
           h                        21
           i                        2A
           j                        5b
           k                        51
           l                        52
           m                        5f
           n                        5e
           o                        5g
           p                        53
           q                        66
           r                        67
           s                        62
           t                        63
           u                        68
           v                        64
           w                        65
           x                        41
           y                        4e
           z                        42
           0                        4f
           1                        43
           2                        4b
           3                        4g
           4                         J
           5                         K
           6                         G
           7                         L
           8                         S
           9                         N
