V. The ancient Virus World and evolution of cells. Biology Direct 19, 29 (2006) Koonin, E. V. & Wolf, Y. I. Genomics of bacteria and archaea: The emerging dynamic view of the prokaryotic world.

Could today's single-stranded RNA viruses be descendants of these precellular RNA molecules? Others have argued that precursors of today's NCLDVs led to the emergence of eukaryotic cells.

While much about the origin of the nucleus is speculative, one hypothesis suggests that the nucleus of modern eukaryotes may have resulted from a partnership between a prokaryotic host and a virus.

This is the first eukaryotic virus (a virus that infects eukaryotes, such as plants, animals, fungi) found to encode such a protein. Viruses are packets of genetic material surrounded by a protein ...

Scientists propose that the eukaryotic branch of this family tree formed when two ... proteins from the RNA-induced silencing complex, and viperins (short for virus-inhibitory protein, endoplasmic ...