Nucleic Acids Research, 1988, Vol. 16, No. 7 2873-2884
© 1988
Articles |
A new and fast method for prearing high quality lambda DNA suitable for sequencing
European Molecular Biology Laboratory Postfach 10.2209, D-6900 Heidelberg, FRG International Center for Genetic Engineering and Biotechnology Padriciano 99, 34012 Trieste, Italy
*To whom correspondence should be addressed
Received January 7, 1988. Revised March 4, 1988. Accepted March 4, 1988.
A method is described for the rapid purification of high quality lambda DNA. The method can be used from either liquid or plate lysates and on a small scale or a large scale. It relies on the preadsobtion of all polyanions present in the lysate to an "insoluble" anion-exchange matrix (DEAE or TEAE). Phage particles are then disrupted by combined treatment with EDTA/proteinase K and the resulting DNA is precipitated by the addition of the cationic detergent cetyl (or hexadecyl)-trimethyl ammonium bromide-CTAB ("soluble" anion-exchange matrix). The precipitated CTAB-DNA complex is then exchanged to Na-DNA and ethanol precipitated. The resultant purified DNA is suitable for enzymatic reactions and provides a high quality template for dideoxy-sequence analysis.
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