a protein sequence from the UniProt Knowledgebase (Swiss-Prot and TrEMBL) or
protein sequence with a chosen enzyme, and computes the masses of the
generated peptides. The tool also returns theoretical isoelectric point and
mass values for the
protein of interest. If desired, PeptideMass can return the mass of peptides
known to carry post-translational modifications, and can highlight peptides
whose masses may be affected by database conflicts, polymorphisms or splice variants.
Instructions are available.