Another very nice software to calculate protein/peptide masses from
sequences, as well as generating fragments and their masses is Sherpa.
If you have a Mac somewhere around you, you should try it. It is worth its
price.
http://www.lsbc.com:70/Sherpa.html
Michael
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Dr. Michael Schrader
BioVisioN GmbH & Co. KG
Feodor-Lynen-Str. 5
D-30625 Hannover
GERMANY
Phone +49-511-53 88 96-12
Fax +49-511-53 88 96-66