    New chain ID            Original chain ID

9lah-pdb-bundle1.pdb:
           A                        Ao
           B                        AJ
           C                        AK
           D                        AA
           E                        AL
           F                        AB
           G                        AC
           H                        AD
           I                        AM
           J                        AG
           K                        AI
           L                        AE
           M                        AN
           N                        AO
           O                        AP
           P                        AQ
           Q                        AR
           R                        AH
           S                        AF
           T                        AS
