An ancient divergence among the bacteria

@article{Balch2005AnAD,
  title={An ancient divergence among the bacteria},
  author={William E. Balch and Linda J. Magrum and George E. Fox and Ralph S. Wolfe and Carl R. Woese},
  journal={Journal of Molecular Evolution},
  year={2005},
  volume={9},
  pages={305-311}
}
SummaryThe 16S ribosomal RNAs from two species of methanogenic bacteria, the mesophileMethanobacterium ruminantium and the thermophileMethanobacterium thermoautotropbicum, have been characterized in terms of the oligonucleotides produced by digestion withT1 ribonuclease. These two organisms are found to be sufficiently related that they can be considered members of the same genus or family. However, they bear only slight resemblance to “typical” Procaryotic genera; such asEschericbia, Bacillus… 

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