Welcome to the webpage for the program to calculate all theoretically possible Amino Acid Compositions from peptide masses.

This program generates amino acid compositions of all theoretically possible peptides as described in: Nefedov AV, Mitra I, Brasier AR, Sadygov RG, Examining Troughs in the Mass Distribution of All Theoretically Possible Tryptic Peptides, J. Proteome Res. 2011;10:4150

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