Table 1. Intra-genomic 16S rRNA variability for Bacteria and Archaea with full-genome sequence availability.
| Organism |
No. rRNAa operons |
Diff. (nt)b |
% differencec |
| Aquifex aeolicus VF5 | 2 | – | – |
| Bacillus subtilis ATCC 23857 | 10 | 1–15 | 0.97 |
| Campylobacter jejuni ATCC 700819 | 3 | – | – |
| Deinococcus radiodurans ATCC 13939 | 3 | 0–2 | 0.13 |
| Escherichia coli ATCC 10798 | 7 | 0–19 | 1.23 |
| Haemophilus influenzae ATCC 51907 | 6 | – | – |
| Helicobacter pylori 26695 | 2 | – | – |
| Methanococcus jannaschii DSMZ 2661 | 2 | 3 | 0.20 |
| Methanococcus themoautotrophicum ATCC 29096 | 2 | 2 | 0.14 |
| Neisseria menigitidis MC 58 | 4 | – | – |
| Treponema pallidum ATCC 25870 | 2 | – | – |
| Ureaplasma urealyticum serovar 3 | 2 | 1 | 0.07 |
| Vibrio cholerae ATCC 39315 | 8 | 0–14 | 0.91 |
| Xyella fastidosa 9a5c | 2 | – | – |
aNumber of rRNA operons per genome.
bPairwise difference range between 16S rRNA genes per genome.
cPairwise difference range between 16S rRNA genes per genome calculated as a percentage. –, no nucleotide differences.