    New chain ID            Original chain ID

9zed-pdb-bundle1.pdb:
           A                         2
           B                         A
           C                        A1
           D                        A2
           E                        A3
           F                        B1
           G                        B2
           H                        B3
           I                        B4
           J                        B5
           K                        B6
           L                         H
           M                         R
