For decades, scientists have known that DNA consists of four basic units
-- adenine, guanine, thymine and cytosine. Those four bases have been
taught in science textbooks and have formed the basis of the growing
knowledge regarding how genes code for life. Yet in recent history,
scientists have expanded that list from four to six.
Now, with a finding published online in the July 21, 2011, issue of the journal Science, researchers from the UNC School of Medicine have discovered the seventh and eighth bases of DNA.
These last two bases – called 5-formylcytosine and 5 carboxylcytosine – are
actually versions of cytosine that have been modified by Tet proteins,
molecular entities thought to play a role in DNA demethylation and stem
cell reprogramming. For more details click here.
Credit: http://news.unchealthcare.org
No comments:
Post a Comment
Thank you for writing to "Chemical Science"