The genetic code is the recipe for life, and provides the instructions for how to make proteins, generally using just 20 amino acids. But certain groups of microbes have an expanded genetic code, in ...

Add Yahoo as a preferred source to see more of our stories on Google. The same amino acid can be encoded by anywhere from one to six different strings of letters in the genetic code. Andrzej ...

There are few hard and fast rules in the study of life, but perhaps the closest we get is the central dogma of molecular biology: DNA is transcribed to RNA, which gets translated into proteins. The ...