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.
Welcome to beautiful, Historic Hampshire County, West Virginia! Hampshire County takes great pride in its history, heritage, and agriculture. Visit West Virginia's oldest town, and get a taste of our heritageâ¦.