    New chain ID            Original chain ID

9pdt-pdb-bundle1.pdb:
           A                         T
           B                         M
           C                         V
           D                         X
           E                         Y
           F                         N
           G                         Z
           H                         a
           I                         b
           J                         d
           K                         e
           L                         Q
           M                         i
           N                         R
           O                         l
           P                         m
           Q                         n
           R                         S
           S                         o
           T                         p
           U                         q
           V                         w
           W                         z
           X                         1
           Y                         2
           Z                         3
           a                         4
           b                         5
           c                         6
           d                         7
           e                         9
           f                        AB
           g                        AC
           h                        AD
           i                        AE
           j                        AF
           k                        AG
           l                        AH
           m                        AI
           n                        AL
           o                        AM
