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.
Whether you are in town for a day, a month, or the rest of your life, you won't be disappointed with Niceville, Florida! Nestled comfortably along the shores of Choctawhatchee Bay in the northwest panhandle, this friendly town is a paradise for people of all ages and interests.