Words similar to α-proteobacterium
Example sentences for: α-proteobacterium
How can you use “α-proteobacterium” in a sentence? Here are some example sentences to help you improve your vocabulary:
Under the single-symbiosis model, eukaryotes should cluster exclusively with an α-proteobacterium (e.g.
However, our initial phylogenetic analyses revealed that many eukaryotes did not cluster with Rickettsia, the α-proteobacterium, as predicted by current genomic models [ 8 25 ] . Instead, they typically formed a basal lineage among eubacteria in the tree.
A corollary to this is that these proteins probably functioned, initially, as regulators of electron-transfer chains in non-photosynthetic energy metabolism systems in the ancestral α-proteobacterium.
Until about five years ago, it was generally accepted that there was a prior period (before mitochondria) in the history of eukaryotes [ 2 26 ] . The basal position of eukaryotes lacking mitochondria (amitochondriate) in phylogenetic trees [ 27 ] was consistent with this supposition as was evidence from sequence signatures [ 6 ] . However, molecular phylogenetic studies of several proteins in recent years have suggested that some or all amitochondriate eukaryotes once possessed mitochondria in the past [ 9 ] . Based on this new evidence, most current models for the origin of eukaryotes assume only a single symbiotic or fusion event between an archaebacterium and an α-proteobacterium [ 8 28 29 ] .
This agrees with the genetic and cell biological evidence implicating an α-proteobacterium as progenitor of the mitochondrion [ 25 ] and supports the hypothesis that these nine eukaryotic proteins owe their origin to that symbiotic event [ 2 ] . However, the remaining 32 proteins do not show this pattern but instead identify other species or groups of eubacteria as closest relative.
Loading...