    New chain ID            Original chain ID

9fo0-pdb-bundle1.pdb:
           A                        A1
           B                        A2
           C                        A5
           D                        AA
           E                        AB
           F                        AC
           G                        AD
           H                        AE
           I                        AF
           J                        AG
           K                        AH
           L                        AI
           M                        AJ
           N                        AK
           O                        AL
           P                        AM
           Q                        AN
           R                        AO
           S                        AP
           T                        AQ
           U                        AR
           V                        AS
           W                        AT
           X                        AU
           Y                        AV
           Z                        AW
           a                        AX
           b                        AY
           c                        AZ
