Table 3 Analysis of molecular distances and synonymous and non-synonymous nucleotide substitutions in gene segments 1 and 3, within each gene (homB or homA alone) and between genes in different strains (homB vs homA), considering pairs of homB and homA sequences of 24 Helicobacter pylori strains.

Mol. distance (nt)

0.061 ± 0.006^&

0.077 ± 0.007

0.113 ± 0.010

0.066 ± 0.005

0.065 ± 0.005

0.064 ± 0.004

Ks

0.199 ± 0.025

0.244 ± 0.026

0.286 ± 0.034

0.209 ± 0.020

0.207 ± 0.020

0.202 ± 0.019

Ka

0.026 ± 0.005

0.030 ± 0.004

0.067 ± 0.011

0.027 ± 0.005

0.025 ± 0.004

0.026 ± 0.004

Ka/Ks

0.131 ± 0.029

0.122 ± 0.021

0.234 ± 0.047

0.129 ± 0.027

0.121 ± 0.021

0.130 ± 0.023