Peptide Ion Calculator is the perfect tool for peptide and protein chemists
Peptide Ion Calculator makes analyzing mass spec data of peptides a breeze. Build you peptide's sequence, then enter experimentally observed ions. Peptide Ion Calculator will return any potential ion who's theoretical exact mass is within 0.3 amu of your observed mass.
Amino Acids: All 20 natural amino acids Several unnatural amino acids Several N-methylated amino acids One N15 labeled amino acid
Now introducing custom masses! Cant find an amino acid or side chain modification? Add it to the app yourself!
Peptide Ion Calculator makes it easy to troubleshoot a failed synthesis. Peptide Ion Calculator will search your observed mass against a list of singe and double deletions/additions, as well as a number of side reaction that can occur during solid phase peptide synthesis.
Side Reactions: Guanidinylation of amines Incomplete deprotection of Fmoc, Boc, Trityl, tBu, Acm.
Currently supports positive ionization mode, up to triply charged species, either as M or 2M species: plus H, Na, or K.
Awesome app Great calculator for all SPPS chemists! Keep up the good work!