An Engineered Bacterium Is Able to Copy DNA that Contains Unnatural Genetic Letters
For all of recorded history, billions of years, the blueprint of life has been written with just four letters — adenine (A), thymine (T), cytosine (C) and guanine (G), the DNA subunits contained in all organisms. Now that has changed. Scientists at Scripps Research Institute in La Jolla, California, have identified a pair of bases, … Read more