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.
Great Waves is open ANNUALLY from Memorial Day weekend through Labor Day, and is one of the premier waterparks in Northern Virginia. The park also features a deluxe miniature golf course, a nine-station batting cage, picnic shelters, and a special events pavilion.