This functional category is represented by 66.5%, 50%, and 100% of orthologs belonging to the high purifying, weak purifying and the divergent ortholog set, respectively.
Reflecting the signature of high purifying selection predominantly identified by the LRTs and BEB values, the conservation index indicates high rates of purifying selection across eutherian mammals (Fig. 2).
The TAP tag was more recently developed in order to obtain high purified protein samples for mass spectrometry analysis of protein complexes [ 29].
Cox1, cox2, atp6, cytb, cox3 and nd3 showed the lowest Ka/Ks values (below 0.1), suggesting that those genes are under high purifying selection.
We discovered that to better survive from the random deletion process, persistent genes, which are under inherent high purifying selection pressure, organized as clusters.
Within the high purifying group (Ka/Ks <0.5), 211 sequences were specifically involved in ATP binding activity, while 13.5% of transcripts were metabolically active transcripts.
Probably because of the functional roles played in the respiratory chain by the mitochondrial genome, PCGs showed high purifying selection and low nucleotide divergence among the species investigated here.
Nevertheless, noncontact residues from the surface of COX I subunit are a remarkable exception, being subjected to an exceptionally high purifying selection that may be related to the maintenance of a suitable heme environment.
This is consistent with the idea that the X chromosome is under higher purify selection as males only have a single copy (19, 20).
This represents the highest purified total and functional yields for A2aR yet achieved from any heterologous expression system.
