    New chain ID            Original chain ID

9jb2-pdb-bundle1.pdb:
           A                         C
           B                         A
           C                         B
           D                         D
           E                         E
           F                        CC
           G                        BE
           H                        BD
           I                        BC
           J                        BB
           K                        BA
           L                        CB
           M                        CA
           N                        CD
           O                        CE
