Nevertheless, the evolution of some regulatory elements can be traced back to the origin of the vertebrate lineage [ 10].
Given that evolution is traced back to the origin of cells, this might appear justified; however, I find the article more speculative than necessary.
As is the case for the APETALA1, APETALA3, AGAMOUS and SEPALLATA gene lineages [ 5, 28, 40, 51- 53], the AGL6 lineage underwent a duplication that can be traced back to the origin of the core eudicot clade.
"The proposition is that the origin of the genetic code traces back to the origin of metabolism", that is a nice thought but Copley et al. (2005) should developed that previously, but from a very different angle.
However, contact with cats could not be traced back to the origin places because the owners of the gathering premises had a very limited information about the history of the donkeys bought.
For example, alternative splicing of Smad2 and Smad8, inferred from dbEST, can be traced back to the origin of vertebrates, suggesting a profound functional significance (manual datamining of Ensembl, data not shown).
Sequence alignment and phylogenetic tree construction showed that the Gal-1A/Gal-1B divergencancan be traced back to the origin of the sauropsid lineage (consisting of extinct and extant reptiles and birds) although lineage-specific duplications also occurred in the amphibian and actinopterygian genomes.
Recovery of some duplicated genes, such as 18S rRNA, in chaetognath species dispersed throughout the tree of the phylum have also suggested that this duplication may be traced back to the origin of the phylum (Telford and Holland 1997; Papillon et al. 2006).
This fighting spirit can be traced back to the origins of the Shunkoin Temple.
The origins of software validation trace back to the very origins of computer programs and their attempted formal definitions.
The origins trace back to the pre-Hispanic era, when they were kept as trophies and used during rituals.
