Schematic representation of virus-related loci. (a) tgv1 and (b) tgv2. Genes are indicated by arrows. Exclusive T. gammatolerans genes are not colored. Coordinates are in nucleotides. The respective att sequences of each locus are specified. CDS homologues found in T. kodakaraensis tkv2 and/r tkv3 virus-like loci  are colored in blue (a). CDSs more frequently found in Bacteria than in Archaea are colored in green (b). CDSs well distributed in Archaea are colored in purple (b).