when was phenylalanine discovered
Phenylalanine has been around as long as life itself, if not longer. It's not something that someone invented one day. It's like oxygen: no one invented it, it's been here as long as anyone can remember, and far longer! J. Heinrich Matthaei and Marshall W. Nirenberg figured out a way to make a bacterium produce long chains of phenylalanine molecules in 1961.