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Related Concept Videos

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

1.6K
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Ion Exchange01:17

Ion Exchange

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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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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,...
934
Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

6.1K
Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
6.1K
SDS-PAGE01:27

SDS-PAGE

32.5K
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...
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Two-dimensional Gel Electrophoresis01:22

Two-dimensional Gel Electrophoresis

7.1K
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...
7.1K

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Related Experiment Video

Updated: Dec 22, 2025

Staining of Proteins in Gels with Coomassie G-250 without Organic Solvent and Acetic Acid
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Staining of Proteins in Gels with Coomassie G-250 without Organic Solvent and Acetic Acid

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Data for semi-permanent cationic coating for protein separations.

C L Crihfield1, C J Kristoff1, L M Veltri1

  • 1C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA.

Data in Brief
|May 6, 2020
PubMed
Summary
This summary is machine-generated.

A novel coating for capillary electrophoresis efficiently separates cationic and anionic proteins. This advancement enhances protein analysis in various scientific fields, offering high reproducibility and performance.

Keywords:
Capillary electrophoresisElectroosmotic flowProtein adsorptionSemi-permanent coatingSurface modificationpH-stability

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Area of Science:

  • Biochemistry and analytical chemistry
  • Biotechnology and pharmaceutical sciences

Background:

  • Protein separation and analysis are critical across diverse scientific disciplines.
  • Existing methods face challenges in efficiency and versatility for protein analysis.

Purpose of the Study:

  • To introduce and characterize a novel phospholipid-cetyltrimethylammonium bromide coating for capillary electrophoresis.
  • To evaluate the coating's efficiency in separating both cationic and anionic proteins.

Main Methods:

  • Utilized capillary electrophoresis with UV absorbance detection.
  • Employed protein standards to assess coating performance.
  • Determined the operational pH range and reproducibility.

Main Results:

  • Achieved high-efficiency separation of cationic and anionic proteins.
  • Identified a working pH range of 4-9.
  • Demonstrated excellent reproducibility (≤1% RSD) and high plate counts (up to 480,000 for lysozyme at pH 7).

Conclusions:

  • The novel coating offers a robust and efficient solution for protein separations.
  • This method significantly improves protein analysis in fields like drug discovery and biotechnology.
  • The coating's performance metrics support its application in demanding analytical workflows.