    New chain ID            Original chain ID

7odk-pdb-bundle1.pdb:
           A                       AAA
           B                       BBB
           C                       AlA
           D                       AmA
           E                       AnA
           F                       AoA
           G                       AqA
           H                       AsA
           I                       AwA
           J                       BkB
           K                       BmB
           L                       BoB
           M                       BpB
           N                       BqB
           O                       BvB
           P                       BwB
