title: Transposition of IS2 into the hemB gene of Escherichia coli K-12.
abstract: Genetic studies of the hemB gene in Escherichia coli have resulted in the recovery of both stable and unstable mutant strains. The stable strains have been shown to result from large deletions. This study demonstrates that unstable strains result from the insertion of transposable element IS2 primarily into the 5' region of the structural gene; the instability results from precise excision of the element, producing strains with both high and low frequencies of reversion. This first report of IS2 insertion into hemB suggests that this gene may be a preferred target for insertion of this transposable element.
authors.affiliation: Department of Biology, York College of the City University of New York, Jamaica 11451.
authors.forename: L A
authors.initials: LA
authors.lastname: Lewis
authors.forename: D
authors.initials: D
authors.lastname: Lewis
authors.forename: V
authors.initials: V
authors.lastname: Persaud
authors.forename: S
authors.initials: S
authors.lastname: Gopaul
authors.forename: B
authors.initials: B
authors.lastname: Turner
mesh_terms: D000445:Aldehyde Oxidoreductases / Q000235:genetics*; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D015139:Blotting, Southern; D004251:DNA Transposable Elements; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D016133:Polymerase Chain Reaction; D015183:Restriction Mapping; D017422:Sequence Analysis, DNA
chemical_list: D001426:Bacterial Proteins; D004251:DNA Transposable Elements; D000445:Aldehyde Oxidoreductases; C067282:glutamyl tRNA reductase