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PeptideSynthetics: Peptide Protein Research Ltd.

Peptide Mass Calculator

Use this handy calculator to work out the mass of your amino acid sequence. It handles n-terminal modifications, oxidized cysteines and phosphorylated amino acids.

Type a * following an S, T or Y for phosphorylated amino acids.



N-Terminal Modifications

clear sequence


Copyright © 1996 Ronald C. Beavis. Updated by Dominic Winsor Sept 2002, and Claire Council 2014

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