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Related Concept Videos

Proteomics01:33

Proteomics

7.7K
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
7.7K
Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

6.2K
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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Related Experiment Video

Updated: Aug 21, 2025

Consensus Brain-derived Protein, Extraction Protocol for the Study of Human and Murine Brain Proteome Using Both 2D-DIGE and Mini 2DE Immunoblotting
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Top-Down Proteomics and Comparative 2D-DIGE Analysis.

Kay Ohlendieck1

  • 1Department of Biology, Maynooth University, National University of Ireland, Maynooth, Co. Kildare, Ireland. kay.ohlendieck@mu.ie.

Methods in Molecular Biology (Clifton, N.J.)
|November 15, 2022
PubMed
Summary
This summary is machine-generated.

Top-down proteomics, a key area in protein biochemistry, offers valuable insights into protein modifications. This approach, combined with advanced techniques, enhances biological and biomedical research.

Keywords:
Comparative proteomicsDIGEDifference gel electrophoresisMass spectrometryTop-down proteomicsTwo-dimensional gel electrophoresis

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Area of Science:

  • Proteomics
  • Protein Biochemistry
  • Biomedical Research

Background:

  • Proteomics has emerged as a distinct discipline through advancements in protein separation, mass spectrometry, and bioinformatics.
  • Discovery and targeted proteomics are essential tools in biological and biomedical research.
  • Analytical approaches are categorized as proteoform-centric top-down or peptide-centric bottom-up proteomics.

Purpose of the Study:

  • To outline the scientific value of top-down proteomics.
  • To describe the integration of fluorescence two-dimensional difference gel electrophoresis with post-translational modification analysis.
  • To discuss on-membrane digestion and comparative two-dimensional immunoblotting.

Main Methods:

  • Top-down proteomics
  • Fluorescence two-dimensional difference gel electrophoresis (2D-DIGE)
  • Mass spectrometry
  • Systems bioinformatics
  • On-membrane digestion
  • Comparative two-dimensional immunoblotting

Main Results:

  • Top-down proteomics provides a comprehensive view of proteoforms.
  • 2D-DIGE enables detailed separation and analysis of proteins.
  • The combination of techniques allows for systematic analysis of post-translational modifications.
  • On-membrane digestion and immunoblotting facilitate efficient and comparative protein analysis.

Conclusions:

  • Top-down proteomics is a powerful approach for understanding protein complexity and modifications.
  • Integrating various techniques enhances the depth and scope of proteomic analysis.
  • This chapter provides a framework for utilizing advanced proteomic strategies in research.