    New chain ID            Original chain ID

9zn9_1-pdb-bundle1.pdb:
           A                         E
           B                         F
           C                         G
           D                         H
           E                         I
           F                         J
           G                         K
           H                         L
           I                         A
           J                         C
           K                         D
9zn9_1-pdb-bundle2.pdb:
           A                         D
           B                         B
