The key elements of an amino acid are carbon, hydrogen, oxygen, and nitrogen, though other elements are found in the side-chains of certain amino acids. About 500 amino acids are known and can be classified in many ways.
Friendly is a town in Tyler County, West Virginia, in the United States.
West Virginia is real, from the wild outdoors to the kind folks. A simple place for families to reconnect. For lovers to explore. Where adventure is the everyday. It's one-of-a-kind, down-home, mountain living. And there's more hidden in these hills than you could ever expect.