title: Identification of an insertion sequence, IS1203 variant, in a Shiga toxin 2 gene of Escherichia coli O157:H7.
abstract: An insertion sequence composed of 1310 bp was found in Shiga toxin 2 genes of some isolates of Escherichia coli O157:H7. This insertion sequence showed extremely high homology with IS1203 of E. coli O111:H(-). This IS1203 variant was inserted in the region encoding the amino-terminus of the B subunit with a duplication of 3 bp at the target site, resulting in inactivation of the Shiga toxin 2 gene.
authors.affiliation: Tsuruga Institute of Biotechnology, Toyobo Co. Ltd., Tsuruga, Fukui 914-0047 Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kusumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Nishiya
authors.forename: Y
authors.initials: Y
authors.lastname: Kawamura
authors.forename: K
authors.initials: K
authors.lastname: Shinagawa