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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

5.8K
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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Subcellular Fractionation01:32

Subcellular Fractionation

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The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
Differential centrifugation is...
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SDS-PAGE01:27

SDS-PAGE

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Gel electrophoresis is a method that separates biological macromolecules like nucleic acids or proteins by forcing them to pass through a gel matrix under an electric field.
A variation of gel electrophoresis, termed  polyacrylamide gel electrophoresis (PAGE), is commonly used for separating proteins according to their molecular size by passing them through a polyacrylamide gel. Because of the varying charges associated with amino acid side chains, PAGE can be used to separate intact...
27.3K
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
332
Types Of Column Chromatography01:29

Types Of Column Chromatography

10.9K
The stability and compatibility of column material with samples are crucial for efficient purification in chromatographic techniques. Various operating parameters such as pH, temperature, or solvent affect the packing of the column material, thereby determining the purification efficiency. The choice of column material also plays an essential role in deciding the operating parameters and can be modified based on the proteins that need to be purified.
Gel Filtration Chromatography
When the...
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CN-GELFrEE - Clear Native Gel-eluted Liquid Fraction Entrapment Electrophoresis
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In-Gel and In-Solution Approaches to Protein and Peptide Fractionation.

Dylan H Multari1, Mohadeseh Montazeri Shatouri1, Sabrina Grizzi de Oliveira1

  • 1School of Natural Sciences, Macquarie University, North Ryde, NSW, Australia.

Methods in Molecular Biology (Clifton, N.J.)
|December 23, 2024
PubMed
Summary
This summary is machine-generated.

This study presents two proteome fractionation methods, SDS-PAGE and high-pH reversed-phase fractionation, to enhance protein identification in complex biological samples. These techniques significantly increase the number of identified peptides compared to single-shot analysis, improving proteome coverage.

Keywords:
Filter-aided sample preparation (FASP)High-pH reversed-phase fractionationIn-gel digestionProteomicsSodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE)

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Area of Science:

  • Proteomics
  • Molecular Biology
  • Biochemistry

Background:

  • Understanding cellular functions requires comprehensive protein identification.
  • Identifying the entire proteome is crucial but challenging for complex biological samples.
  • Current methods may not capture the full protein content.

Purpose of the Study:

  • To describe detailed protocols for proteome fractionation.
  • To enhance the identification of proteins from complex biological samples.
  • To demonstrate the versatility of these methods across different sample types.

Main Methods:

  • Proteome fractionation at the protein level using SDS-PAGE.
  • Proteome fractionation at the peptide level using high-pH reversed-phase fractionation.
  • Application of these methods to diverse biological sample types.

Main Results:

  • Both SDS-PAGE and high-pH reversed-phase fractionation significantly increase peptide identifications.
  • These methods yield more comprehensive proteome coverage compared to conventional single-shot analysis.
  • Combining fractionation methods generates larger, complementary datasets.

Conclusions:

  • Proteome fractionation techniques are effective for maximizing protein identification.
  • These protocols enhance the depth and breadth of proteome analysis.
  • The described methods offer versatile solutions for complex biological sample processing.