Figure 1.
Distribution of all identified htp genes among 38 streptococci in a clear phylogenetic background.
A. Phylogenetic analysis of 38 streptococci based on 530 single-copy orthologous proteins. Node labels indicate aLRT SH-like branch support values. Twenty-six species have been used in the previous phylogeny analysis based on 16s rDNA, while 14 species or subspecies were newly added and labeled in bold. Group division was updated based on the phylogenetic relationship. B. Copy numbers of htp genes within each genome are indicated with complete genes plus pseudogenes.
Figure 2.
The phylogenetic tree of htp genes based on CDS.
Node labels indicate aLRT SH-like branch support values. The htp genes found from non-streptococcal species are shaded. For each gene, the CDS number in its genome is found behind the species name. Arrows in different colors are used to represent htp I or htp II genes. Asterisks (*) are used to indicate the represented gene when a species has tandem duplicated htp genes.
Figure 3.
Sliding-window analysis for Ka/Ks values of two subfamilies of htp genes.
Ka/Ks ratios were calculated for A) htp I subfamily and B) htp II subfamily using DnaSP with a sliding window of 60 bases and a 15-base step size.