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Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...

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Related Experiment Video

Updated: May 25, 2026

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis
09:33

High-Resolution Complexome Profiling by Cryoslicing BN-MS Analysis

Published on: October 15, 2019

Accurate peptide fragment mass analysis: multiplexed peptide identification and quantification.

Chad R Weisbrod1, Jimmy K Eng, Michael R Hoopmann

  • 1Department of Genome Sciences, University of Washington , 815 Mercer Street, Seattle, Washington 98109, United States.

Journal of Proteome Research
|February 1, 2012
PubMed
Summary

Fourier Transform-All Reaction Monitoring (FT-ARM) offers a novel peptide analysis method. This technique enhances peptide identification and quantification, complementing existing shotgun analysis approaches.

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Conventional peptide analysis methods like data-dependent shotgun analysis can struggle with complex samples containing overlapping precursors.
  • Accurate peptide identification and quantification are crucial for large-scale biological studies.

Purpose of the Study:

  • To introduce and evaluate Fourier Transform-All Reaction Monitoring (FT-ARM) as a novel method for peptide identification and quantification.
  • To demonstrate the complementary nature and advantages of FT-ARM compared to existing techniques.

Main Methods:

  • FT-ARM utilizes continuous, data-independent, high mass accuracy MS/MS acquisition over a defined m/z range.
  • Custom software compares theoretical or empirical fragment ions against all fragmentation spectra for peptide identification and quantification.
  • A dot product score is calculated to generate score chromatograms for analysis, without relying on chromatographic elution profiles.

Main Results:

  • FT-ARM identifications are complementary to data-dependent shotgun analysis, particularly when overlapping precursors interfere.
  • The sensitivity, robustness, and specificity of FT-ARM quantification are comparable to selected reaction monitoring (SRM).
  • FT-ARM requires minimal assay development, offering a significant advantage.

Conclusions:

  • FT-ARM is a novel and effective method for peptide identification and quantification in large-scale analyses.
  • This technique offers a valuable alternative and complement to existing proteomic analysis strategies.
  • The minimal assay development needed for FT-ARM makes it an accessible tool for researchers.