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.
Explore Richburg. Pet-friendly hotel near I-77 Speedway and close to Rock Hill Mall. Our Days Inn Richburg hotel offers comfort and value off I-77. Our hotel is near the Olde English District, one of 11 tourism districts in the state, and we give you easy access to woodlands, waterways, as well as state and national parks.