Title: accurate mass tag
Long Title: IUPAC Gold Book - accurate mass tag
DOI: 10.1351/goldbook.12327
Status: current

Definition
Value of the mass of a peptide from a protein that has been chemically or enzymatically cleaved into fragments. The mass is recorded with sufficiently high accuracy and precision that it can be used in identification of the protein.

Related Term
- peptide mass fingerprinting (PMF): https://goldbook.iupac.org//terms/view/12522

Source
- 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)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/12327/html
- json: https://goldbook.iupac.org/terms/view/12327/json
- xml: https://goldbook.iupac.org/terms/view/12327/xml

Citation: Citation: 'accurate mass tag' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.12327
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-07-12T16:39:31+00:00