[EMBOSS] iep program for multiple protein sequences

[Tao Song]

Hi,

     I wonder can the iep program  that calculates the isoelectric point of 
a protein be used
for a protein database? When asked to input protein sequence I gave 'tsw' 
instead of
'tsw:laci_ecoli' I got an error that said 'sequence must be protein sequence 
without BZ U X
or *: found bad character Z'. Does iep can only take one protein sequence as 
input file?

    I really appreciate all the help I got from you guys. Thanks a lot!

     Regards,

     Tao