December 20, 2017
The recipes for life, going back billions of years to the earliest single-celled organisms, are encoded in a DNA alphabet of just four letters. But is four as high as the DNA code can go? Or, as researchers have long wondered, is it chemically and biologically possible to expand the DNA code by a couple of letters?
Source: NIH Director’s Blog
https://directorsblog.nih.gov/2017/12/05/adding-letters-to-the-dna-alphabet/
