Figure 1.

Phylogenetic tree highlighting the position of A. acidocaldarius 104-IA^T relative to the other type strains within the family. The tree was inferred from 1,419 aligned characters [28,29] of the 16S rRNA gene sequence under the maximum likelihood criterion [30] and rooted with the genus Sulfobacillus. The branches are scaled in terms of the expected number of substitutions per site. Numbers above branches are support values from 1,000 bootstrap replicates if larger than 60%. Lineages with type strain genome sequencing projects registered in GOLD [31] are shown in blue, published genomes in bold.