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. You and your pet are going to have a rollicking good time in pet-friendly West Virginia. Don't want to miss the West Virginia Hot Dog Festival, with its wiener dog races, pooch parade, and dog costume and owners/dog lookalike contests.