    New chain ID            Original chain ID

9ss0-pdb-bundle1.pdb:
           A                        AA
           B                        AC
           C                        AD
           D                        AE
           E                        AF
           F                        AG
           G                        AH
           H                        AJ
           I                        AK
           J                        AN
           K                        AO
           L                        AP
           M                        AQ
           N                        AS
           O                        AT
           P                        D1
           Q                        F1
           R                        F3
