New organisms have been engineered using the first ever 6-letter genetic code | International News Live Blog

https://internationalnewsliveblog.wordpress.com/2017/01/25/new-organisms-have-been-engineered-using-the-first-ever-6-letter-genetic-code/

Every living thing on Earth is formed with a DNA code made up of four bases. These modified E. coli carry an entirely new type of DNA, adding two new bases. http://internationalnewslive.com/new-organisms-have-been-engineered-using-the-first-ever-6-letter-genetic-code/