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Stable isotope labeling methods in protein profiling.

Johan Lengqvist1, AnnSofi Sandberg

  • 1Biopharmaceutical Research Unit, Department of Protein Science, Novo Nordisk A/S, Måløv, Denmark.

Methods in Molecular Biology (Clifton, N.J.)
|June 15, 2013
PubMed
Summary

Quantitative mass spectrometry enables large-scale proteomics by improving protein quantification accuracy. This guide details stable isotope labeling methods for reproducible biomarker discovery in biological and clinical research.

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Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Mass spectrometry (MS) has advanced significantly, enabling large-scale proteomics.
  • Improvements in instrumentation, data analysis, and databases facilitate global protein abundance measurement.
  • Accurate protein quantification is crucial for identifying biomarkers in research.

Purpose of the Study:

  • To provide guidance on quantitative protein profiling using stable isotope labeling.
  • To aid in selecting appropriate labeling strategies for proteomics studies.
  • To detail the liquid chromatography-mass spectrometry (LC-MS) data format and analysis.

Main Methods:

  • Stable isotope labeling techniques for quantitative proteomics.
  • Liquid chromatography-mass spectrometry (LC-MS) data acquisition and interpretation.
  • Overview of the quantitative proteomics workflow.

Main Results:

  • Description of various stable isotope labeling methods with their advantages and disadvantages.
  • Guidance on selecting optimal labeling strategies.
  • Explanation of LC-MS data acquisition and understanding.

Conclusions:

  • Quantitative mass spectrometry, particularly with stable isotope labeling, is essential for reproducible biomarker discovery.
  • Understanding LC-MS data and choosing the right labeling strategy are key to successful proteomics research.
  • This chapter serves as a guide for performing quantitative protein profiling.