    New chain ID            Original chain ID

9c7h-pdb-bundle1.pdb:
           A                         0
           B                         1
           C                         2
           D                         3
           E                         4
           F                         5
           G                         6
           H                         7
           I                         8
           J                         9
           K                         u
           L                         v
           M                         w
           N                         x
           O                         y
           P                         z
           Q                        Af
           R                        Ae
           S                        Aa
           T                        Ab
           U                        Ac
           V                        Ad
