Journal
ANALYTICAL BIOCHEMISTRY
Volume 378, Issue 2, Pages 224-225Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2008.04.017
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Alkaline lysis of Escherichia coli is usually the method of choice for plasmid preparation, but ghost bands of denatured supercoiled DNA can result if the pH is too high or the period of lysis is too long. By replacing the usual sodium hydroxide lysis solution with an arginine buffer prepared in the range of pH 11.4 to 12.0, we were able to stabilize the pH during lysis and obtain plasmid that is suitably pure for restriction digestion and DNA sequencing. (C) 2008 Elsevier Inc. All rights reserved.
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