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Related Concept Videos

Mass Spectrum: Interpretation01:24

Mass Spectrum: Interpretation

1.5K
An unknown compound can be established by identifying the molecular ion peak in the mass spectrum. The molecular ion peak is often weak or absent due to the predominance of fragmentation in high-energy electron beams. In such cases, a low-energy electron beam can be used to scan the spectrum to enhance the intensity of the molecular ion peak. Additionally, chemical ionization, field ionization, and desorption ionization spectra are used to obtain a relatively intense molecular ion peak.
To...
1.5K
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

5.6K
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 Spectrum01:23

Mass Spectrum

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A mass spectrum is the graphical representation of the relative abundance of the charged fragments in an analyte plotted against their mass-to-charge ratio (m/z). The plot's x axis represents the ratio of the mass of the charged fragment to the elementary charge it carries. The y axis of the plot represents the relative abundance of each charged species. The relative abundance is calculated from the signal intensity of each charged species recorded at the detector. The most intense signal...
2.2K
Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

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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.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
857
Mass Spectrometers01:16

Mass Spectrometers

5.8K
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
5.8K
Mass Spectrometry: Molecular Fragmentation Overview01:20

Mass Spectrometry: Molecular Fragmentation Overview

3.5K
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.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
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Combining Chemical Cross-linking and Mass Spectrometry of Intact Protein Complexes to Study the Architecture of Multi-subunit Protein Assemblies
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Unified and Standardized Mass Spectrometry Data Processing in Python Using spectrum_utils.

Wout Bittremieux1,2, Lev Levitsky3, Matteo Pilz4

  • 1Department of Computer Science, University of Antwerp, 2020 Antwerp, Belgium.

Journal of Proteome Research
|January 23, 2023
PubMed
Summary
This summary is machine-generated.

The spectrum_utils Python package now offers enhanced mass spectrometry data processing and visualization. Updates include better integration with community data standards and unified plotting for proteomics and metabolomics research.

Keywords:
Pythonmass spectrometrymetabolomicsopen sourceproteomics

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Area of Science:

  • Computational Biology
  • Analytical Chemistry

Background:

  • Mass spectrometry is crucial for proteomics and metabolomics.
  • Existing software tools require improvements in data processing and visualization.
  • Standardization in mass spectrometry data handling is needed.

Purpose of the Study:

  • To present updates to the spectrum_utils Python package.
  • To introduce new functionalities for mass spectrometry data analysis.
  • To enhance data processing and visualization capabilities.

Main Methods:

  • Developed new features for spectrum_utils.
  • Integrated mass spectrometry community data standards.
  • Enhanced mass spectral data processing algorithms.
  • Unified mass spectral data visualization methods.

Main Results:

  • spectrum_utils now supports community data standards.
  • Mass spectral data processing is significantly enhanced.
  • A unified approach to mass spectral data visualization is implemented.
  • The package facilitates diverse applications in proteomics and metabolomics.

Conclusions:

  • The updated spectrum_utils package provides a robust, unified solution for mass spectrometry data analysis.
  • Enhanced features improve data processing, visualization, and interoperability.
  • Freely available open-source software accelerates research in proteomics and metabolomics.