Related Experiment Video
Updated: Aug 19, 2026

Visualization of UV-induced Replication Intermediates in E. coli using Two-dimensional Agarose-gel Analysis
Published on: December 21, 2010
Analysis of heat-denatured DNA using native agarose gel electrophoresis
1Department of Biochemistry and Molecular Biology, University of Texas Medical School, Houston 77030.
Abstract:
The use of native or neutral gels to resolve denatured DNA affords a rapid and convenient analytical method for assessing the consequences of a number of procedures employed in molecular biology research. We demonstrate that this method can be used to analyze transition melting temperature (Tm) and strand breakage in heat-denatured duplex DNA. This shows that some commonly recommended denaturation procedures can result in significant degradation of DNA and that reannealing or aggregation can occur when samples are concentrated or ionic conditions altered.
Related Concept Videos
DNA Agarose Gel Electrophoresis
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...
Southern Blot
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
SDS-PAGE
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...

