MLchartDataset catalogue

a-ion

Term · Chemistry · MLC-T-CHM-000347

A peptide fragment ion that contains the N-terminus, formed when a protonated peptide dissociates at the backbone bond between the alpha carbon and the carbonyl carbon of a residue. It therefore equals the corresponding b-ion minus carbon monoxide, a difference of 27.995 u. In tandem mass spectra the a-ion appears 28 u below the matching b-ion.

Table 1. Record
IdentifierMLC-T-CHM-000347
FieldChemistry
SubjectAnalytical Chemistry
ReferencesPAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1520 (https://doi.org/10.1351/PAC-REC-06-04-06)
Record as JSON 
{
  "id": "MLC-T-CHM-000347",
  "term": "a-ion",
  "field": "Chemistry",
  "definition": "A peptide fragment ion that contains the N-terminus, formed when a protonated peptide dissociates at the backbone bond between the alpha carbon and the carbonyl carbon of a residue. It therefore equals the corresponding b-ion minus carbon monoxide, a difference of 27.995 u. In tandem mass spectra the a-ion appears 28 u below the matching b-ion.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1520 (https://doi.org/10.1351/PAC-REC-06-04-06)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/a-ion/"
}

Record 367 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.