[EMBOSS] protein sequence format question

[Tao Song]

Hi,

      I try to use DIGEST function in EMBOSS for tryptic digest
of protein sequence. The sequence file I download from the following 
link:
ftp://ftp.ebi.ac.uk/pub/databases/biomart/current/uniprot_mart_17/uniprot_sequence__sequence__main.txt.gz 

     It is a tab delimited flat file which includes all protein sequences. It seems
that it is not any of the formats EMBOSS support. I wonder is it still possible
to use DIGEST function?

     I attached a small file of the sequence database.

     Thanks a lot for your help!

     Regards,

     Tao     
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