TABLE 1.

16S rRNA gene intragenomic heterogeneity among a variety of bacterial taxonomic groups

Taxonomic groupNo. of sequenced genomesNo. of genomes with multiple 16S rRNA genes16S rRNA gene copy no.Mean 16S rRNA gene copy no. ± SDaNo. of heterogeneous positionsMean no. of heterogeneous positions ± SDa16S rRNA gene length (nt)
Aquificae112ND0ND1545
Thermotogae101ND0ND1519
Deinococci113ND2ND1463
Cyanobacteria421-42 ± 0.4100 ± 01446-1451
Chlorobi112ND0ND1463
Proteobacteria1446-1523
    Alphaproteobacteria961-42.22 ± 0.0900 ± 01446-1461
    Betaproteobacteria431-43.25 ± 0.500 ± 01498-1503
    Gammaproteobacteria29261-115.31 ± 0.850-305.69 ± 0.891498-1523
    Epsilonproteobacteria431-32 ± 0.820-10.5 ± 0.581457-1474
Firmicutes
    Bacillales11115-137.45 ± 0.734-3410.27 ± 0.761502-1525
    Lactobacillales12124-65.42 ± 0.080-30.92 ± 0.001507-1528
    Clostridiales335-118.67 ± 0.216-1913 ± 0.561467-1474
    Thermoanaerobacteriales114ND188ND1496-1589
    Mollicutes621-21.33 ± 0.520-30 ± 01473-1486
Actinobacteria1151-62.91 ± 0.260-81.73 ± 0.831481-1506
Chlamydiae721-21.29 ± 0.4900 ± 01513-1515
Spirochaetes321-21.67 ± 0.580-10.33 ± 0.581470-1509
Bacteroidetes115ND34ND1487
Fusobacteria115ND3ND1481
Planctomycetes101ND0ND1496
  • a ND, not done.