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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: Overview01:19

Mass Spectrometry: Overview

Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass. One common type of ionization, known as electron ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave behind a...
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...
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...
Proteomics01:33

Proteomics

A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
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The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
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Navigating the Mass Spectrometry-Based Proteomic Data Using Free Computational Tools
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Introduction to mass spectrometry-based proteomics.

Rune Matthiesen1, Jakob Bunkenborg

  • 1Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Porto, Portugal.

Methods in Molecular Biology (Clifton, N.J.)
|May 14, 2013
PubMed
Summary
This summary is machine-generated.

This chapter introduces mass spectrometry (MS)-based proteomics, a key technique for global protein analysis. It guides newcomers through essential concepts, sample preparation, instrumentation, and data processing for comprehensive proteomic insights.

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Area of Science:

  • Biochemistry and Molecular Biology
  • Analytical Chemistry
  • Proteomics

Background:

  • Mass spectrometry is a powerful tool for biomolecular analysis, with proteomics being a rapidly advancing application.
  • Effective utilization of mass spectrometry data in proteomics requires careful decision-making throughout the experimental process.

Purpose of the Study:

  • To provide a foundational introduction to mass spectrometry (MS)-based proteomics for individuals new to the field.
  • To outline common experimental setups, key concepts, and analytical choices in MS-based proteomics.
  • To serve as a guide to reference materials for further in-depth study of specific aspects.

Main Methods:

  • Discussion of various mass spectrometry (MS) applications in proteomics.
  • Exploration of how different combinations of sample preparation, MS instrumentation, and data processing strategies impact proteomic analysis.
  • Overview of commonly used experimental setups and their associated analytical challenges.

Main Results:

  • Highlights the multifaceted nature of mass spectrometry data analysis in proteomics.
  • Emphasizes that different proteomic questions can be addressed by tailoring experimental parameters.
  • Introduces fundamental concepts crucial for understanding advanced proteomics techniques.

Conclusions:

  • Mass spectrometry-based proteomics offers diverse applications, each requiring specific analytical strategies.
  • Optimizing sample preparation, instrumentation, and data processing is critical for successful proteomic studies.
  • This introductory chapter lays the groundwork for deeper exploration of MS-based proteomics.