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Large-scale isolation of plasmid DNA using cetyltrimethylammonium bromide
1Dept. of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104-6049.
Biotechniques
|July 1, 1990
Summary
This study presents a rapid, large-scale plasmid DNA isolation method using cetyltrimethylammonium bromide and spin columns. The procedure yields high-purity plasmid DNA comparable to traditional methods, in just five to six hours.
Area of Science:
- Molecular Biology
- Biotechnology
Background:
- Traditional plasmid DNA isolation methods can be time-consuming and involve hazardous chemicals.
- There is a need for efficient, large-scale plasmid DNA purification techniques for molecular biology applications.
Purpose of the Study:
- To develop and describe a rapid, large-scale method for plasmid DNA isolation.
- To evaluate the purity and yield of plasmid DNA obtained using the novel method.
Main Methods:
- Utilized lysozyme digestion and boiling for initial DNA extraction.
- Employed cetyltrimethylammonium bromide for plasmid precipitation.
- Purified plasmid DNA using a spin column (pZ523).
Main Results:
- Achieved large-scale isolation of plasmid DNA.
- Obtained plasmid DNA with purity and yield comparable to cesium chloride-ethidium bromide gradient centrifugation.
- The method avoids phenol-chloroform extractions.
Conclusions:
- The described method offers a rapid (5-6 hours) and efficient alternative for large-scale plasmid DNA isolation.
- The isolated plasmid DNA is suitable for downstream applications like restriction digestion, cloning, and sequencing.