    New chain ID            Original chain ID

9umh-pdb-bundle1.pdb:
           A                        AL
           B                        AM
           C                        AN
           D                        AO
           E                        AP
           F                        AQ
           G                        AR
           H                        AS
           I                        AT
           J                        AU
           K                        AV
           L                        AW
           M                        AX
           N                        AY
           O                        AZ
           P                        Aa
           Q                        Ab
           R                        Ac
           S                        Ad
           T                        Ae
           U                        Af
