Peptide mass calculator

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About
Peptide Calculator 1.0.1
This Peptideweb.com application is tool to calculate the molecular formulae, accurate monoisotopic and average masses of your peptide.
You can work with a sequence in one- or
three-letter amino acid code, choose few popular modifications on N- and C-terminals or add disulfide bridges.
The masses are calculated using the following atomic weights:
Element
Monoisotopic mass
Average mass
H
1.0078250
1.0079400
C
12.0000000
12.0110000
O
15.9949146
15.9994000
S
31.9720718
32.0660000
N
14.0030740
14.0067400
Please visit our webpage www.peptideweb.com for newest version of our application and new products dedicated for every peptide laboratory.
Good luck!
Wojciech Kamysz
with co-workers: W. Strugala, B. Kraska