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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
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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 electrospray 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...
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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.
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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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Top-Down Mass Spectrometry Data Analysis Using TopPIC Suite.

In Kwon Choi1, Xiaowen Liu2

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|June 3, 2022
PubMed
Summary
This summary is machine-generated.

Top-down mass spectrometry (MS) enables detailed proteoform analysis. This study details methods for analyzing top-down MS data using the TopPIC Suite software for improved proteomic insights.

Keywords:
Proteoform identificationProteoform quantificationProteomicsSpectral deconvolutionTop-down mass spectrometry

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Area of Science:

  • Proteomics
  • Mass Spectrometry
  • Biochemistry

Background:

  • Top-down mass spectrometry (MS) offers advantages over bottom-up MS for studying complex proteoforms.
  • Advances in MS techniques have increased interest in top-down proteomics.
  • TopPIC Suite is a commonly used software for top-down MS data analysis.

Purpose of the Study:

  • To present detailed methods for analyzing top-down MS data.
  • To guide researchers in utilizing TopPIC Suite for proteoform identification and quantification.

Main Methods:

  • Utilizing the TopPIC Suite software package.
  • Applying established protocols for top-down MS data processing.
  • Focusing on proteoform identification and quantification strategies.

Main Results:

  • The presented methods facilitate effective analysis of top-down MS data.
  • Demonstration of TopPIC Suite's capabilities in proteomic analysis.

Conclusions:

  • TopPIC Suite provides a robust platform for top-down MS-based proteomic studies.
  • The described methods enhance the utility of TopPIC Suite for complex proteoform analysis.