    New chain ID            Original chain ID

9yf8-pdb-bundle1.pdb:
           A                        PA
           B                        PB
           C                        PC
           D                        PD
           E                        PE
           F                        PF
           G                        PG
           H                        PH
           I                        PI
           J                        PJ
           K                        PK
           L                        PL
