amino acid, amino acid classification and properties, type of amino acid, what are amino acid,

  Amino acids are organic compounds containing amine [- NH2] carboxyl [-COOH] side chain [R group] The major key elements if amino acids are carbon, hydrogen, nitrogen, oxygen. About 500 amino acids are known (though only 20 appear in the genetic code) and can be classified in many ways.

  AMINO ACID  

BASIC STRUCTURE [SKELETON] OF AMINO ACID: -