Hendrix R W
Department of Biological Sciences, Pittsburgh Bacteriophage Institute, University of Pittsburgh, Pittsburgh 15260, USA.
Curr Biol. 1999;9(24):R914-7. doi: 10.1016/s0960-9822(00)80103-7.
The structure of a phage capsid protein provides good evidence this phage shares ancestry with an animal virus. In this and similar cases, either the viral lineages predate the emergence of the three contemporary domains of life, or viruses have been leaping the phylogenetic chasms that separate the domains.
噬菌体衣壳蛋白的结构提供了有力证据,表明这种噬菌体与一种动物病毒有着共同的祖先。在这种情况以及类似情况下,要么病毒谱系早于当今三个生命域的出现,要么病毒一直在跨越分隔这些域的系统发育鸿沟。