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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

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Two-dimensional gel electrophoresis is a high-resolution protein separation method first introduced by O' Farrell and Klose in 1975. This method involves protein separation by two dimensions, mass and charge, making it more accurate than one-dimensional gel electrophoresis.
The first dimension separation uses the isoelectric focusing or IEF technique performed on immobilized pH gradient (IPG) strips that separate proteins according to their isoelectric points.
Biological samples, such...
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Quantitative Proteomics Using Reductive Dimethylation for Stable Isotope Labeling
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Two-step OFFGEL approach for effective peptide separation compatible with iTRAQ labeling.

Alexis Rideau1, Damien Besson, Alice Boissard

  • 1Paul Papin Cancer Center, Institut de Cancérologie de l'Ouest, INSERM U892, Angers, France.

Proteomics
|October 12, 2013
PubMed
Summary

This study introduces a new 2D OFFGEL electrophoresis (OGE) method for peptide fractionation. This approach enhances proteomic coverage in complex samples, especially when combined with iTRAQ labeling for quantitative proteomics.

Keywords:
OFFGELOGETechnologyiTRAQ

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Area of Science:

  • Proteomics
  • Analytical Chemistry
  • Biochemistry

Background:

  • Shotgun proteomic analysis of complex samples requires effective peptide fractionation.
  • OFFGEL electrophoresis (OGE) is a valuable tool for in-solution peptide separation and pI-based validation.
  • OGE is compatible with iTRAQ labeling, enabling quantitative proteomics applications.

Purpose of the Study:

  • To present a novel 2D-OGE approach for improved proteomic analysis.
  • To enhance proteomic coverage of complex biological mixtures.
  • To demonstrate compatibility with iTRAQ labeling for quantitative studies.

Main Methods:

  • Development and application of a two-dimensional OFFGEL electrophoresis (2D-OGE) technique.
  • Fractionation of peptides from complex samples, including colorectal cell line lysates.
  • Integration with iTRAQ labeling for quantitative proteomic analysis.

Main Results:

  • The 2D-OGE approach significantly improves proteomic coverage compared to single-dimension methods.
  • Effective fractionation of peptides from complex biological samples was achieved.
  • The method is compatible with iTRAQ labeling, facilitating quantitative proteomic studies.

Conclusions:

  • The novel 2D-OGE method offers enhanced proteomic discovery in complex mixtures.
  • This technique provides a robust platform for quantitative proteomics using iTRAQ labeling.
  • 2D-OGE represents a significant advancement in peptide fractionation strategies for shotgun proteomics.