    New chain ID            Original chain ID

7odv-pdb-bundle1.pdb:
           A                       AAA
           B                       BBB
           C                       CCC
           D                       DDD
           E                       EEE
           F                       FFF
           G                       AdA
           H                       AhA
           I                       AkA
           J                       AmA
           K                       BaB
           L                       BeB
           M                       DbD
           N                       DdD
           O                       DgD
           P                       DiD
           Q                       DkD
           R                       DmD
           S                       DqD
           T                       EaE
           U                       EcE
