Peptide precursor ion

{
  "id": "MLC-T-CHM-008609",
  "term": "Peptide precursor ion",
  "field": "Chemistry",
  "definition": "An ionized peptide molecule that is selected for fragmentation in a tandem mass spectrometry experiment. This ion undergoes dissociation into smaller fragment ions, which are then detected to provide sequence information about the original peptide. The mass-to-charge ratio of the peptide precursor ion is measured in the first stage of mass analysis.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "top-down proteomics"
  ],
  "references": [
    "PAC, 2018, 90, 1121. 'Terminology of bioanalytical methods (IUPAC Recommendations 2018)' on page 1159 (https://doi.org/10.1515/pac-2016-1120)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/peptide-precursor-ion/"
}