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Related Concept Videos

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.
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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.
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Related Experiment Video

Updated: Jun 12, 2026

A Fast Silver Staining Protocol Enabling Simple and Efficient Detection of SSR Markers using a Non-denaturing Polyacrylamide Gel
10:27

A Fast Silver Staining Protocol Enabling Simple and Efficient Detection of SSR Markers using a Non-denaturing Polyacrylamide Gel

Published on: April 20, 2018

A user-friendly alternative to formaldehyde-based DNA silver-staining method on polyacrylamide gels.

Hong-Zhang He1, Wei-Tao Cong, Cheng-Xi Jiang

  • 1Zhejiang Provincial Key Laboratory of Biopharmaceuticals, Wenzhou Medical College, Wenzhou, PR China.

Electrophoresis
|June 22, 2010
PubMed
Summary

A new DNA detection protocol replaces harmful formaldehyde with glucose for safer, cost-effective DNA visualization on polyacrylamide gels. This method achieves high sensitivity for routine nucleic acids research.

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Last Updated: Jun 12, 2026

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Area of Science:

  • Molecular Biology
  • Biochemistry

Background:

  • Traditional DNA silver staining uses alkaline formaldehyde developer, posing risks to researchers.
  • There is a need for safer and more accessible DNA detection methods in molecular biology.

Purpose of the Study:

  • To develop a practical, cost-effective, and user-friendly protocol for DNA detection on polyacrylamide gels.
  • To replace hazardous chemicals in DNA staining with safer alternatives.

Main Methods:

  • Investigated the use of glucose as a replacement for alkaline formaldehyde in DNA silver staining.
  • Evaluated the effects of six different reducing sugars on DNA visualization quality.
  • Optimized a protocol using glucose in an alkaline borate buffer.

Main Results:

  • Developed an optimal protocol using glucose, completing in approximately 45 minutes.
  • Achieved a detection limit of 5 pg for single DNA bands on polyacrylamide gels.
  • Demonstrated comparable or improved DNA visualization quality compared to traditional methods.

Conclusions:

  • The glucose-based protocol offers a safer, user-friendly, and economical alternative for routine DNA visualization.
  • This method is suitable for nucleic acids research, particularly for DNA detection on polyacrylamide gels.