any compound of carbon and another element or a radical

any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes

a crystalline amino acid that occurs in many proteins

a crystalline amino acid found in proteins and in many plants (e.g., asparagus)

a crystalline amino acid found in proteins and occurring naturally in sugar beets and sugar cane

an amino acid found in the jack bean

an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine

any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes