The Genome Institute of Singapore states that a virus millions of years ago in humans is how embryonic stem cells get turned on and off. The viral transposable gene carrying binding sites for regulatory elements to new locations.
I had also heard some time ago that a virus was implicated is how mammals obtained the placenta.
Doesn't this seem odd to anyone that a virus can do this? How come flu viruses only make us sick?
Edited by barbara, : No reason given.