    New chain ID            Original chain ID

7t0w-pdb-bundle1.pdb:
           A                         A
           B                         B
           C                         C
           D                         D
           E                         E
           F                        L2
           G                         H
           H                        H2
           I                         L
           J                         F
           K                         G
           L                         I
           M                         J
           N                         K
           O                         M
           P                         N
