title: Analysis of Salmonella typhimurium hisD3052 revertants: the use of oligodeoxyribonucleotide colony hybridization, PCR, and direct sequencing in mutational analysis.
abstract: A rapid method for determining the DNA sequences of Salmonella typhimurium hisD3052 revertants is presented. DNA colony hybridization was used to analyze revertants previously studied by Isono and Yourno [Proc Natl Acad Sci USA 71:1612-1617, 1974]. Synthetic oligodeoxyribonucleotide probes (18-mers) were able to distinguish sequences that differed by a single base pair. Mutant his sequences not identified by probing analysis were amplified using polymerase chain reaction (PCR) and directly sequenced. The combined use of DNA-colony hybridization and direct sequencing offers a precise and rapid means for the molecular characterization of hisD3052 revertants.
authors.affiliation: Molecular Biology Branch, Food and Drug Administration, Washington, D.C. 20204.
authors.forename: E
authors.initials: E
authors.lastname: Kupchella
authors.forename: T A
authors.initials: TA
authors.lastname: Cebula
mesh_terms: D001483:Base Sequence; D004252:DNA Mutational Analysis; D006639:Histidine; D008969:Molecular Sequence Data; D009152:Mutagenicity Tests; D009693:Nucleic Acid Hybridization; D015345:Oligonucleotide Probes / Q000737:chemistry; D016133:Polymerase Chain Reaction; D012486:Salmonella typhimurium / Q000235:genetics*
chemical_list: D015345:Oligonucleotide Probes; D006639:Histidine