    New chain ID            Original chain ID

7aek-pdb-bundle1.pdb:
           A                        3A
           B                        3B
           C                        3C
           D                        3D
           E                        3E
           F                        3F
           G                        4A
           H                        4B
           I                        4C
           J                        4D
           K                        4E
           L                        4F
           M                        5A
           N                        5B
           O                        5C
           P                        5D
           Q                        5E
           R                        5F
