Threonine | Essential, Protein Synthesis & Metabolism | Britannica (original) (raw)

amino acid

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• National Center for Biotechnology Information - PubChem - L-Threonine
• Institute of Chemistry and Biochemistry of Freie Universität Berlin - Threonine
• Fact Monster - Science - Threonine

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threonine, an amino acid obtainable from many proteins. One of the last amino acids to be isolated (1935), threonine is one of several so-called essential amino acids; i.e., animals cannot synthesize it and require dietary sources. It is synthesized in microorganisms from the amino acid aspartic acid. The chemical structure of threonine is

This article was most recently revised and updated by Erik Gregersen.