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Related Concept Videos

Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
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...

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Updated: Jun 25, 2026

Large-scale Top-down Proteomics Using Capillary Zone Electrophoresis Tandem Mass Spectrometry
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Large-scale Top-down Proteomics Using Capillary Zone Electrophoresis Tandem Mass Spectrometry

Published on: October 24, 2018

Electron capture dissociation LC/MS/MS for bottom-up proteomics.

Roman A Zubarev1

  • 1Laboratory for Biological and Medical Mass Spectrometry, Uppsala Biomedical Centrum, Uppsala, Sweden.

Methods in Molecular Biology (Clifton, N.J.)
|February 26, 2009
PubMed
Summary

Electron Capture Dissociation (ECD) is a unique fragmentation method in proteomics. It complements other techniques to provide deeper peptide sequence insights, identify modifications, and detect amino acid racemization.

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Mass Spectrometry

Background:

  • Bottom-up proteomics relies on peptide fragmentation for sequence analysis.
  • Collisional dissociation (CD) is a standard fragmentation method.
  • Limitations exist in CD for certain analyses, such as PTM localization and racemization detection.

Purpose of the Study:

  • To highlight the utility of Electron Capture Dissociation (ECD) in bottom-up proteomics.
  • To demonstrate ECD as a complementary technique to collisional dissociation.
  • To showcase ECD's capabilities in peptide sequencing, PTM identification, and racemization analysis.

Main Methods:

  • Utilized Electron Capture Dissociation (ECD) as a peptide fragmentation technique.
  • Applied ECD in conjunction with standard bottom-up proteomics workflows.
  • Analyzed peptide fragmentation data generated by ECD.

Main Results:

  • ECD exhibits unique fragmentation properties beneficial for proteomics.
  • ECD provides complementary sequence information compared to collisional dissociation.
  • ECD effectively aids in locating post-translational modifications (PTMs) on peptides.
  • ECD reveals racemization of individual amino acids within peptide sequences.

Conclusions:

  • Electron Capture Dissociation is a valuable tool in modern proteomics.
  • ECD enhances the depth of information obtainable from peptide analysis.
  • ECD expands the scope of proteomic investigations, particularly for PTMs and stereochemistry.