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.
Kanawha State Forest. Located just seven miles south of Charleston, West Virginia, Kanawha State Forest is in close proximity to the heavily populated Kanawha Valley and is a recreational haven. Some of the state's most popular picnic areas are here, along with significant hiking, mountain biking, and cross-country skiing opportunities.