Abstract
We demonstrate here the means to directly analyze bacterial chromosomal DNA for all classes of single-base mutations in a specific codon in any region of known sequence through the use of DNA probing as a powerful substitute for standard sequencing techniques. With this method, chromosomal DNA from hundreds of mutants can be examined for single-base changes without any DNA cloning. This method can conveniently provide a large data base for the assessment of all classes of single-base mutations occurring spontaneously or induced by a known or suspected mutagen. The method is demonstrated for the analysis of histidine-independent (His+) revertants of hisG46, a missense mutation of Salmonella typhimurium that can revert in six or seven ways.
MeSH Terms
Azacitidine/pharmacology
Bacteriological Techniques
Base Sequence
Chromosomes, Bacterial/analysis
Codon
DNA, Bacterial/analysis
Genes, Bacterial
Genetic Markers
Genetic Techniques
Mutation
Nucleic Acid Hybridization
Oligodeoxyribonucleotides/chemical synthesis,genetics
Salmonella typhimurium/drug effects,genetics
Chemicals
Codon
DNA, Bacterial
Genetic Markers
Oligodeoxyribonucleotides
Azacitidine
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Miller J K
Barnes W M
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18 references, click to expand
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