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Example Sentences for "archaebacteria "

In proteins involved in transcription and translation, eukaryotes often cluster with archaebacteria whereas in metabolic proteins they often cluster with eubacteria [ 1 ] .

This includes the divergence of archaebacteria and archaebacterial proteins in eukaryotes, the origin of cyanobacteria, and the divergence of eubacteria and eubacterial proteins in eukaryotes (the latter presumably reflecting symbiosis).

In comparing rates of evolution in eukaryotic sequences derived independently from eubacteria and archaebacteria in the same protein, those derived from eubacteria (in all cases, BK-o) were found to be evolving at roughly twice the rate as their archaebacteria-derived counterparts (Fig.

In the second case, we found that archaebacteria are evolving at a slower rate than eubacteria, as was noted elsewhere [ 23 ] .

If true, this would bear on our time estimate for the divergence of archaebacteria and eukaryotes.

This indicates that the lineage of archaebacteria leading to the eukaryote nuclear genome diverged prior to the split between the Crenarchaeota and Euryarchaeota.

We find that the divergence between archaebacteria and the lineage leading to eukaryotes (K A ) was quite early (~4 Ga), which is about the time of the earliest biomarker evidence of life (3.

Our initial goal was to estimate divergence times for the last common ancestor (LCA), the divergence between archaebacteria and eukaryotes (AK), cyanobacteria and closest eubacterial relatives (origin of cyanobacteria, BC), eubacteria and mitochondrial eukaryotes (origin of mitochondria, BK-m), and Giardia and other eukaryotes (GK) (Fig.

For examining rates in eukaryotic sequences derived from either archaebacteria or eubacteria, we compared pairwise distances of the same taxa present in both locations (e.

, one pair clustering with archaebacteria and the other with eubacteria) in the same protein.

txt Background Genome sizes in the eubacteria and archaebacteria range from 0.



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