Amino acids are very important organic compounds, containing amine (-NH2) and carboxylic acid (-COOH) functional groups, as well as side chains (R groups) that react with each amino acid. They are a group of compounds with different chemical components in proteins and peptides. The basic elements of amino acids are carbon, hydrogen, nitrogen and oxygen, although other elements are also found in the side chains of certain amino acids. In addition to the 20 amino acids appearing in the genetic code, about 500 amino acids are known and can be classified in many ways. They can be classified as α-, β-, γ- or δ-amino acids according to the position of the functional group. Other categories involve pH, polarity or type of side chain groups. Amino acids contain the second largest component of human cells, muscles and other tissues in the form of proteins. Amino Acid Composition Analysis https://www.computabio.com/amino-acid-composition-analysis-service.html