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Peptide Identification Using Tandem Mass Spectrometry01:33

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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.
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Mass Spectrometry: Complex Analysis01:21

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Mass Spectrum01:23

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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...
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Mass Spectrometry: Overview01:19

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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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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.
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Mass Spectrometers01:16

Mass Spectrometers

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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:
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Mass Spectrometry-Guided Genome Mining as a Tool to Uncover Novel Natural Products
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Graph embedding on mass spectrometry- and sequencing-based biomedical data.

Edwin Alvarez-Mamani1,2, Reinhard Dechant2,3, César A Beltran-Castañón1

  • 1Engineering Department, Pontificia Universidad Católica del Perú, San Miguel, Lima, Peru.

BMC Bioinformatics
|January 3, 2024
PubMed
Summary
This summary is machine-generated.

Graph embedding, a deep learning method, analyzes complex biological networks from mass spectrometry and sequencing data. This approach aids in understanding protein interactions and predicting drug functions for biological discovery.

Keywords:
Biological networkBiomedical dataGraph embedding

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Area of Science:

  • Computational Biology
  • Systems Biology
  • Bioinformatics

Background:

  • Graph embedding techniques leverage deep learning for data analysis tasks like node classification and link prediction.
  • While traditionally used in social networks, these methods are increasingly applied to biomedical data analysis.
  • Advancements have made these computationally intensive techniques more accessible for biological research.

Purpose of the Study:

  • To review the principles of graph embedding techniques.
  • To explore their utility in analyzing biological network data from systems biology studies.
  • To highlight applications in characterizing protein-protein interaction networks and predicting drug functions.

Main Methods:

  • Discussion of fundamental graph embedding principles.
  • Exploration of applications using data from mass spectrometry and sequencing experiments.
  • Focus on recent advancements and case studies.

Main Results:

  • Graph embedding provides powerful tools for dissecting complex biological networks.
  • Characterization of protein-protein interaction networks is enhanced by these methods.
  • Prediction of novel drug functions is a key emerging application.

Conclusions:

  • Graph embedding techniques are valuable for advancing biological discoveries.
  • These methods offer new avenues for systems biology research.
  • Further development will likely expand their impact in drug discovery and network biology.