TABLE 1.
16S rRNA gene intragenomic heterogeneity among a variety of bacterial taxonomic groups
| Taxonomic group | No. of sequenced genomes | No. of genomes with multiple 16S rRNA genes | 16S rRNA gene copy no. | Mean 16S rRNA gene copy no. ± SDa | No. of heterogeneous positions | Mean no. of heterogeneous positions ± SDa | 16S rRNA gene length (nt) |
|---|---|---|---|---|---|---|---|
| Aquificae | 1 | 1 | 2 | ND | 0 | ND | 1545 |
| Thermotogae | 1 | 0 | 1 | ND | 0 | ND | 1519 |
| Deinococci | 1 | 1 | 3 | ND | 2 | ND | 1463 |
| Cyanobacteria | 4 | 2 | 1-4 | 2 ± 0.41 | 0 | 0 ± 0 | 1446-1451 |
| Chlorobi | 1 | 1 | 2 | ND | 0 | ND | 1463 |
| Proteobacteria | 1446-1523 | ||||||
| Alphaproteobacteria | 9 | 6 | 1-4 | 2.22 ± 0.09 | 0 | 0 ± 0 | 1446-1461 |
| Betaproteobacteria | 4 | 3 | 1-4 | 3.25 ± 0.5 | 0 | 0 ± 0 | 1498-1503 |
| Gammaproteobacteria | 29 | 26 | 1-11 | 5.31 ± 0.85 | 0-30 | 5.69 ± 0.89 | 1498-1523 |
| Epsilonproteobacteria | 4 | 3 | 1-3 | 2 ± 0.82 | 0-1 | 0.5 ± 0.58 | 1457-1474 |
| Firmicutes | |||||||
| Bacillales | 11 | 11 | 5-13 | 7.45 ± 0.73 | 4-34 | 10.27 ± 0.76 | 1502-1525 |
| Lactobacillales | 12 | 12 | 4-6 | 5.42 ± 0.08 | 0-3 | 0.92 ± 0.00 | 1507-1528 |
| Clostridiales | 3 | 3 | 5-11 | 8.67 ± 0.21 | 6-19 | 13 ± 0.56 | 1467-1474 |
| Thermoanaerobacteriales | 1 | 1 | 4 | ND | 188 | ND | 1496-1589 |
| Mollicutes | 6 | 2 | 1-2 | 1.33 ± 0.52 | 0-3 | 0 ± 0 | 1473-1486 |
| Actinobacteria | 11 | 5 | 1-6 | 2.91 ± 0.26 | 0-8 | 1.73 ± 0.83 | 1481-1506 |
| Chlamydiae | 7 | 2 | 1-2 | 1.29 ± 0.49 | 0 | 0 ± 0 | 1513-1515 |
| Spirochaetes | 3 | 2 | 1-2 | 1.67 ± 0.58 | 0-1 | 0.33 ± 0.58 | 1470-1509 |
| Bacteroidetes | 1 | 1 | 5 | ND | 34 | ND | 1487 |
| Fusobacteria | 1 | 1 | 5 | ND | 3 | ND | 1481 |
| Planctomycetes | 1 | 0 | 1 | ND | 0 | ND | 1496 |
a
ND, not done.