    New chain ID            Original chain ID

8ugl-pdb-bundle1.pdb:
           A                        4A
           B                        4B
           C                        4C
           D                        4D
           E                        4E
           F                        4F
           G                        4G
           H                        4H
           I                        4I
           J                        4J
           K                        4K
           L                        4L
           M                        4M
           N                        4N
