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.
Intersection of Interstates 77 and 81 in Southwest Virginia. You can search the world over and not find another community named Wytheville. Thatâs only the beginning of this small townâs uniqueness. Located at the intersection of two major north-south arteries, Interstates 77 & 81, this charming small town in the mountains of Southwest Virginia offers a variety of musical entertainment, shopping opportunities, rich history and abundance of outdoor recreation.