    New chain ID            Original chain ID

8fwm-pdb-bundle1.pdb:
           A                         3
           B                         D
           C                         E
           D                         F
           E                         G
           F                         p
           G                         q
           H                         r
           I                         s
           J                        AV
           K                        Aa
           L                        Ae
           M                        Ad
           N                        AS
           O                        AT
