Related Experiment Video
Updated: Dec 29, 2025

Visualization of UV-induced Replication Intermediates in E. coli using Two-dimensional Agarose-gel Analysis
Published on: December 21, 2010
Neutral-Neutral 2-Dimensional Agarose Gel Electrophoresis for Visualization of E. coli DNA Replication Structures
Karla A Mettrick1, Georgia M Weaver1, Ian Grainge2
1School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, Australia.
Abstract:
Neutral-neutral 2-dimensional agarose gel electrophoresis enables the detection of replication intermediate structures in DNA. Here we describe how DNA from Escherichia coli cells can be purified to retain replication intermediates and then be separated by size and shape using two consecutive agarose gel electrophoresis protocols. The DNA structures present within a localized region can be visualized by a Southern blotting/radioactive hybridisation protocol.
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...
Two-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...

