z-ion

{
  "id": "MLC-T-CHM-012812",
  "term": "z-ion",
  "field": "Chemistry",
  "definition": "A type of fragment ion observed in tandem mass spectrometry, particularly in the collision-induced dissociation of peptides. It results from the cleavage of the peptide backbone at a peptide bond, retaining the C-terminal portion of the peptide and carrying the charge on the oxygen atom of the carbonyl group. The mass of a z-ion is characteristic of the amino acid sequence from the C-terminus.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1600 (https://doi.org/10.1351/PAC-REC-06-04-06)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/z-ion/"
}