Related Experiment Video
Updated: May 16, 2026
06:24
Fluorescent Silver Staining of Proteins in Polyacrylamide Gels
Published on: April 21, 2019
Modified silver staining in 2DE improves protein detection even at extremely low sample concentration
Yun Khoon Liew1, Vasanthakumari Neela, Rukman Awang Hamat
1Department of Medical Microbiology and Parasitology, Universiti Putra Malaysia, Serdang, Malaysia.
Electrophoresis
|November 20, 2012
Summary
A modified silver staining method enhances protein detection sensitivity in 2D gel electrophoresis (2DE). This improved technique is ideal for analyzing limited biological samples, enabling detection at much lower protein concentrations.
Area of Science:
- Proteomics
- Biochemistry
- Analytical Chemistry
Background:
- Classical silver staining in 2D gel electrophoresis (2DE) typically requires protein concentrations between 0.13 to 1.40 μg/μL.
- Analyzing limited biological samples with traditional methods presents a significant challenge in achieving adequate protein detection.
Purpose of the Study:
- To develop a modified silver staining protocol with enhanced sensitivity for 2DE.
- To enable the detection of proteins at significantly lower concentrations than conventional methods.
- To provide an optimized method for the analysis of scarce biological samples.
Main Methods:
- Modification of the silver impregnation and development reaction steps in the classical silver staining procedure.
- Application of the modified protocol to 2DE gels for protein visualization.
- Quantitative analysis of protein detection limits using the modified method.
Main Results:
- The modified silver staining method successfully detected protein spots at extremely low loaded concentrations, ranging from 0.0048 to 0.0480 μg/μL.
- This represents a substantial increase in sensitivity compared to the typical range of the classical method.
- The protocol, from sample separation to analysis, is completed within approximately two days.
Conclusions:
- The modified silver staining protocol offers superior sensitivity for 2DE analysis.
- This method is highly recommended for studies involving limited biological samples.
- The enhanced detection capabilities facilitate more comprehensive proteomic analysis from scarce resources.
More Related Videos
Related Concept Videos
01:20Immunogold Electron Microscopy
Immunoelectron microscopy utilizes immunogold labeling of endogenous proteins with specific antibodies to detect and localize these proteins in cells and tissues. The procedure provides insights into the distribution and quantification of protein under different stimulation conditions offering clues about their functions. Conjugating highly electron-dense gold particles with primary or secondary antibodies allow antigen detection on and within cells, with high resolution and specificity.
01:22Two-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...
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...
01:27SDS-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...
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...
01:15Western Blotting
Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.