    New chain ID            Original chain ID

9ouu-pdb-bundle1.pdb:
           P                         P
           B                         B
           D                         D
           A                         A
           C                         C
           F                         F
           I                         I
           J                         J
           E                         E
           G                         G
           H                         H
           K                         K
           M                         M
           L                         L
           N                         N
