FIG. 2.

Sequence analysis of Gθ-GθW rDNAs. The identical rDNA sequences amplified from both the wild-type and deletion mutant chromosomes were analyzed for distance evaluation in comparison with the five closest Sulfolobus type strains as indicated. The distance matrix of weighted neighbors and the derived phylogenetic tree were produced in the analysis performed with the Ribosomal Database Project Phylip interface program. In the matrix, values above and below the diagonal are similarity and distance indices, respectively. A similarity of 1.000 and a distance of 0.000 correspond to 100% sequence identity.