Table 1 Comparison of nucleotide diversity in core genes and homoplasy in the encoded proteins of H. pylori

core genes analyzed

992

1106

1200

diversity, π

3.81 ± 0.03%

2.25 ± 0.02%

4.21 ± 0.03%

dN

1.44 ± 0.03%

0.91 ± 0.02%

1.74 ± 0.04%

dS

14.14 ± 0.11%

7.79 ± 0.08%

15.23 ± 0.13%

genes showing homoplasy in encoded proteins

971

963

1126

amino acid positions with repeated changes

7.85 ± 0.15%

2.33 ± 0.06%

5.10 ± 0.11%

recombinant genes

488

258

490

amino acid positions with repeated changes in encoded proteins of recombinant genes

9.03 ± 0.20%

2.83 ± 0.12%

6.02 ± 0.18%

non-recombinant genes

504

848

710

amino acid positions with repeated changes in encoded proteins of non-recombinant genes

6.66 ± 0.21%

2.15 ± 0.07%

4.40 ± 0.13%