Comparison of the arsC operon in different strains. The region of the arsC operon within the ATCC 3502 strain was compared to the arsC region in other strains. The horizontal arrows indicate coding sequences (CDSs). Gene designations are labelled above the arrow. GenBank locus IDs are labelled below the arrow. The first CDS was given the full GenBank locus ID followed by an abbreviated ID that uses only the last 2-3 digits. At this site (847 kb - 868 kb) there is no toxin gene cluster within ATCC 3502; however, this site contains the bont/a1 of the A1(B) strain and the bont/f within the Langeland strain. The components in this region are depicted in the Kyoto-F, Loch Maree, 657 and Okra strains. The regions flanking the arsC operon are similar upstream and downstream in each of these strains.