Words similar to archaebacteria
Example sentences for: archaebacteria
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In proteins involved in transcription and translation, eukaryotes often cluster with archaebacteria whereas in metabolic proteins they often cluster with eubacteria [ 1 ] . Among the latter proteins, eukaryotes sometimes group with α-proteobacteria, presumably reflecting the origin of mitochondria, and plants sometimes cluster with cyanobacteria, reflecting the origin of plastids.
We compared rates of change in archaebacterial versus eubacterial sequences using paralogous sequences (those related by gene duplication) as a root for relative rate tests [ 47 48 ] . To examine rate differences between eukaryotic sequences and their closest prokaryote orthologs (those representing the same gene), we used the more distant prokaryote (archaebacteria or eubacteria) as root.
Sample size (eight protein sets) also was limited in the Kollman and Doolittle study [ 23 ] . Taken together these data suggest the following relative order of rate differences: archaebacteria < eubacteria < eukaryotes (archaebacterial origin) < eukaryotes (eubacterial origin).
One of their first and most significant findings was the discovery of the third kingdom of life, the Archaebacteria (later renamed Archaea) [ 2 3 4 ] . Subsequently, the analysis of ribosomal RNA produced the first phylogenetic tree, based on the analysis of a single molecule, that included prokaryotes, protozoa, fungi, plants, and animals [ 4 ] . These accomplishments were the foundation for the subsequent revolution in rRNA-based phylogenetic analysis, which has resulted in the sequencing of more than 10,000 16S and 16S-like rRNA and 1,000 23S and 23S-like rRNA genes, from laboratories trying to resolve the phylogenetic relationships for organisms that occupy different sections of the big phylogenetic tree.
Thus, we conducted a phylogenetic analysis of 72 proteins containing representatives of the two major groups of archaebacteria, eukaryotes, and eubacteria.
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