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Related Concept Videos

Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

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 as  cells...
SDS-PAGE01:27

SDS-PAGE

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 proteins...
Electrophoresis: Overview01:20

Electrophoresis: Overview

Electrophoresis is a powerful analytical separation technique that relies on the differential migration of charged species when subjected to an electric field. The core strength of electrophoresis lies in its ability to separate high-molecular-weight species in complex mixtures. It has found widespread use in biochemistry, molecular biology, and analytical chemistry, allowing the separation of compounds like amino acids, nucleotides, carbohydrates, and proteins with excellent resolution.
There...
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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,...
DNA Agarose Gel Electrophoresis02:35

DNA Agarose Gel Electrophoresis

Agarose gel electrophoresis is a laboratory technique commonly used to separate DNA fragments by size. However, it can also be used to isolate and purify DNA fragments using a gel extraction protocol.
Gel extraction follows five major steps: running gel electrophoresis to separate fragments, isolating the individual bands, extracting DNA from those bands, and removing the dye and salts from the extracted mixture to obtain pure DNA.
In cloning experiments, both the insert and vector DNA...
Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...

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Related Experiment Video

Updated: Jul 6, 2026

Fast and Sensitive Colloidal Coomassie G-250 Staining for Proteins in Polyacrylamide Gels
10:57

Fast and Sensitive Colloidal Coomassie G-250 Staining for Proteins in Polyacrylamide Gels

Published on: August 3, 2009

A multivariate spot filtering model for two-dimensional gel electrophoresis.

Morten Beck Rye1, Bjørn K Alsberg

  • 1Department of Chemistry, Norwegian University of Science and Technology, Trondheim, Norway. mortenry@phys.chem.ntnu.no

Electrophoresis
|March 19, 2008
PubMed
Summary

This study developed a multivariate spot filtering model to remove noise and artifacts in 2-DE gel images. The model accurately distinguishes true protein spots from unwanted segments, improving gel analysis.

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Last Updated: Jul 6, 2026

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Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome
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Two-dimensional Gel Electrophoresis Coupled with Mass Spectrometry Methods for an Analysis of Human Pituitary Adenoma Tissue Proteome

Published on: April 2, 2018

Area of Science:

  • Proteomics
  • Biomedical Imaging
  • Computational Biology

Background:

  • Image segmentation is crucial for analyzing protein spots in 2-DE gels.
  • Noise and artifacts (e.g., cracks, fingerprints, dust) in gel images hinder accurate protein quantification and comparison.
  • Effective removal of these artifacts is essential for reliable gel analysis.

Purpose of the Study:

  • To develop and validate a multivariate spot filtering model for removing noise and artifacts from 2-DE gel images.
  • To improve the accuracy and reliability of protein spot analysis in 2-DE.

Main Methods:

  • A multivariate spot filtering model was developed using image segments from 2-DE gel segmentation.
  • Model parameters were based on texture, shape, and intensity measurements of image segments.
  • Discriminant partial least squares regression was employed for classification.

Main Results:

  • The developed model successfully separated image segments caused by noise, artifacts, and cracks from true protein spots.
  • The filtering model demonstrated high efficacy in distinguishing between genuine protein features and unwanted image elements.
  • This approach enhances the quality of data used for protein quantification and comparative analysis.

Conclusions:

  • The multivariate spot filtering model effectively removes artifacts in 2-DE gel image segmentation.
  • This method significantly improves the accuracy of protein spot identification and quantification.
  • The developed technique offers a valuable tool for automated and reliable analysis of 2-DE gels.