    New chain ID            Original chain ID

9d9w-pdb-bundle1.pdb:
           A                        Aa
           B                        Ab
           C                        Ac
           D                        Ad
           E                        Ae
           F                        Af
           G                        Ba
           H                        Bb
           I                        Bc
           J                        Bd
           K                        Be
           L                        Bf
           M                        Ca
           N                        Cb
           O                        Cc
           P                        Cd
           Q                        Ce

9d9w-pdb-bundle2.pdb:
           A                        Cf
           B                        Da
           C                        Db
           D                        Dc
           E                        Dd
           F                        De
           G                        Df
           H                        Ea
           I                        Eb
           J                        Ec
           K                        Ed
           L                        Ee
           M                        Ef
           N                        Fa
           O                        Fb
           P                        Fc

9d9w-pdb-bundle3.pdb:
           A                        Fd
           B                        Fe
           C                        Ff
           D                        Fg
           E                        Fh
           F                        Fi
           G                        Fj
           H                        Fk
           I                        Fl
