    New chain ID            Original chain ID

6ta1-pdb-bundle1.pdb:
           A                         A
           G                         G
           B                         B
           C                         C
           D                         D
           E                         E

6ta1-pdb-bundle2.pdb:
           K                         K
           L                         L
           F                         F
           H                         H
           I                         I
           J                         J
