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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...
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MALDI-TOF Mass Spectrometry01:19

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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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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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Mass Spectrometry: Amine Fragmentation00:55

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Determination of the Gas-phase Acidities of Oligopeptides
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Peptide Sequence Analysis by Electron Transfer Dissociation Mass Spectrometry: A Web-Based Tutorial.

Donald F Hunt1, Jeffrey Shabanowitz, Dina L Bai

  • 1Department of Chemistry, University of Virginia, Charlottesville, VA, 22904, USA.

Journal of the American Society for Mass Spectrometry
|March 31, 2015
PubMed
Summary
This summary is machine-generated.

This tutorial teaches manual interpretation of electron transfer dissociation (ETD) mass spectra. Learn to identify key peaks, precursor mass, and fragmentation mechanisms for better data analysis.

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Proteomics

Background:

  • Electron Transfer Dissociation (ETD) is a powerful technique for peptide and protein analysis.
  • Interpreting ETD spectra manually can be challenging for novice researchers.
  • Existing educational resources may not be easily accessible or comprehensive.

Purpose of the Study:

  • To develop an accessible web-based tutorial for manual interpretation of ETD spectra.
  • To enhance understanding of ETD fragmentation processes and spectral features.
  • To provide a supplementary learning tool for mass spectrometry researchers.

Main Methods:

  • Creation of a web-based tutorial detailing ETD principles.
  • Explanation of ETD fragmentation, including precursor mass and charge state determination.
  • Guidance on identifying significant peaks, neutral losses, and electron transfer without dissociation (ETnoD).

Main Results:

  • A comprehensive tutorial is available online.
  • The tutorial explains the mechanisms of fragment ion creation in ETD.
  • It aims to simplify the identification of spectral components.

Conclusions:

  • The tutorial serves as a valuable resource for learning ETD spectrum interpretation.
  • It democratizes access to knowledge previously shared in short courses.
  • This tool supports students and researchers in the mass spectrometry community.