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Related Concept Videos

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...

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Related Experiment Video

Updated: May 19, 2026

Semi-automated Biopanning of Bacterial Display Libraries for Peptide Affinity Reagent Discovery and Analysis of Resulting Isolates
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Semi-automated Biopanning of Bacterial Display Libraries for Peptide Affinity Reagent Discovery and Analysis of Resulting Isolates

Published on: December 6, 2017

Implicit biology in peptide spectral libraries.

Manor Askenazi1, Michal Linial

  • 1Department of Biological Chemistry, Hebrew University of Jerusalem, Israel. manoras@cs.huji.ac.il

Analytical Chemistry
|August 23, 2012
PubMed
Summary
This summary is machine-generated.

Data mining mass spectral libraries reveals hidden biological insights. Analyzing the presence and absence of peptide spectra uncovers post-translational modifications and proteolytic sites, offering new avenues for biological discovery.

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Selected Reaction Monitoring Mass Spectrometry for Absolute Protein Quantification
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Last Updated: May 19, 2026

Semi-automated Biopanning of Bacterial Display Libraries for Peptide Affinity Reagent Discovery and Analysis of Resulting Isolates
13:49

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Published on: December 6, 2017

Selected Reaction Monitoring Mass Spectrometry for Absolute Protein Quantification
09:04

Selected Reaction Monitoring Mass Spectrometry for Absolute Protein Quantification

Published on: August 17, 2015

Area of Science:

  • Proteomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Mass spectral libraries are crucial for identifying small molecules and peptides.
  • The NIST spectral library is a comprehensive resource with over 500,000 annotated spectra.
  • These libraries are primarily developed for technological advancements in spectral identification.

Purpose of the Study:

  • To demonstrate that mass spectral libraries are a rich source of biological knowledge.
  • To show that data-mining these libraries can reveal protein biology characteristics.
  • To explore the inference of biological trends from spectral data, including absence of spectra.

Main Methods:

  • Systematic data-mining of published mass spectral libraries, specifically the NIST library.
  • Application of strict empirical thresholds for data analysis.
  • Analysis of both the presence and absence of spectra for individual peptides from whole-proteome digests.

Main Results:

  • Data-mining yielded significant biological characteristics of protein biology.
  • The comprehensive nature of libraries enabled inference from spectral presence and absence.
  • Absence of spectra was linked to complex post-translational modifications and overlooked proteolytic sites.

Conclusions:

  • Mass spectral libraries, beyond their technological purpose, contain valuable biological information.
  • Systematic mining exposes subtle biological signatures like genetic variants, regulated proteolysis, and PTMs.
  • This approach offers a novel method for uncovering biological insights from existing spectral data resources.