    New chain ID            Original chain ID

9mgh-pdb-bundle1.pdb:
           A                        Ta
           B                        Tb
           C                        Tc
           D                        Td
           E                        Te
           F                        Tf
           G                        Tg
           H                        Th
           I                        Ti
           J                        Tj
           K                        Tk
           L                        Tl
