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Related Experiment Videos

Complex proteome prefractionation using microscale solution isoelectrofocusing.

Hsin-Yao Tang1, David W Speicher

  • 1The Wistar Institute, 3601 Spruce Street, Philadelphia, PA 19104, USA. tangh@wistar.org

Expert Review of Proteomics
|July 8, 2005
PubMed
Summary
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Microscale solution isoelectric focusing (IEF) effectively separates complex proteomes. This prefractionation method enhances protein profiling and aids in discovering low-abundance proteins in samples like cancer cells.

Area of Science:

  • Proteomics
  • Biochemistry
  • Analytical Chemistry

Background:

  • Mammalian proteomes are highly complex, featuring proteins across a wide dynamic range.
  • Existing protein profiling technologies struggle with this complexity, limiting comprehensive analysis.
  • Sample prefractionation is a key strategy to enhance proteomic analysis capacity.

Purpose of the Study:

  • To review the application of microscale solution isoelectric focusing (IEF) for proteomic sample prefractionation.
  • To highlight strategies for expanding protein profiling capabilities using IEF.
  • To focus on mining low-abundance proteins within complex proteomes.

Main Methods:

  • Microscale solution isoelectric focusing (IEF) for high-resolution proteome separation based on isoelectric points.

Related Experiment Videos

  • Commercialization of the ZOOM IEF Fractionator for convenient sample prefractionation.
  • Integration of IEF prefractionation with downstream proteomic analysis strategies.

    • Main Results:

    • IEF effectively fractionates complex human samples, including cancer cells and biologic fluids.
    • Well-resolved fractions with minimal cross-contamination are achieved.
    • The method significantly expands protein profiling capacity for complex proteomes.

    Conclusions:

    • Microscale solution IEF is a powerful tool for prefractionating complex proteomes.
    • This technique facilitates the comprehensive analysis of mammalian cell, tissue, and fluid proteomes.
    • IEF prefractionation is crucial for discovering low-abundance proteins in challenging samples.