    New chain ID            Original chain ID

9c7v-pdb-bundle1.pdb:
           A                        10
           B                         1
           C                         2
           D                         3
           E                         4
           F                         5
           G                         6
           H                         7
           I                         8
           J                         A
           K                         B
           L                         C
           M                         D
           N                         E
