    New chain ID            Original chain ID

8rrx-pdb-bundle1.pdb:
           H                         H
           I                         I
           K                         K
           L                         L
           A                         A
           C                         C
           J                         J

8rrx-pdb-bundle2.pdb:
           D                         D
           E                         E
           F                         F
           G                         G
           M                         M
