Product ion which originates in a peptide precursor ion fragmentation process.
Note: Peptide fragment ions are generated in pairs according to the kind of mechanism that dissociates the chemical bonds around the peptide bond.
Source:
PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1158 (https://doi.org/10.1515/pac-2016-1120)