title: Variable numbers of rRNA gene operons in Bacillus cereus strains.
abstract: Ribosomal RNA operon organisation was analysed in two Bacillus cereus strains of different chromosome size, ATCC 10987 (5.4 Mb) and F0837/76 (2.4 Mb). We estimated that there were twelve and nine copies of the rRNA operons in these two strains, respectively. In B. cereus ATCC 10987 six rRNA operons were less than 10 kb apart, while in B. cereus F0837/76 four rRNA operons were similarly clustered. The origin of replication was located in the vicinity of a rRNA operon in both strains.
authors.affiliation: Institute of Pharmacy and Biotechnology Centre of Oslo, University of Oslo, Norway.
authors.forename: T
authors.initials: T
authors.lastname: Johansen
authors.forename: C R
authors.initials: CR
authors.lastname: Carlson
authors.forename: A B
authors.initials: AB
authors.lastname: Kolstø
mesh_terms: D001409:Bacillus cereus / Q000235:genetics*; D001483:Base Sequence; D015139:Blotting, Southern; D002876:Chromosomes, Bacterial / Q000235:genetics; D005798:Genes, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D009876:Operon; D016133:Polymerase Chain Reaction; D012335:RNA, Ribosomal / Q000235:genetics*; D017422:Sequence Analysis, DNA
chemical_list: D012335:RNA, Ribosomal