Abstract
A procedure is described for the detection of specific DNA sequences in Saccharomyces cerevisiae. This method allows a rapid screening of a large number of yeast colonies. The yeast cells of each colony, grown on nitrocellulose filters, are converted, in situ, to protoplasts by snail enzyme, and are then lysed and their DNAs are denatured and fixed on the filter. The presence of the specific DNA sequence is detected directly on the filter by hybridization with a radioactive cRNA. We have used successfully this technique to detect the presence or the absence of specific mt DNA sequences in p+, p- and p0 strains, and to detect the presence or the absence of the 2 mum DNA sequences in different strains.
MeSH Terms
Base Sequence
Clone Cells
DNA, Circular/analysis
DNA, Mitochondrial/analysis
Escherichia coli/genetics
Nucleic Acid Hybridization
Phosphorus Radioisotopes
RNA, Bacterial/metabolism
Saccharomyces cerevisiae/genetics
Chemicals
DNA, Circular
DNA, Mitochondrial
Phosphorus Radioisotopes
RNA, Bacterial
Authors & Affiliations
4 authors, click to expand affiliations / ORCID
Blanc H
Dujon B
Guerineau M
Slonimski P P
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