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Threonine, one of the 20 naturally occuring amino acids, is nutritionally essential in humans because they cannot synthesze it. Threonine contains two chiral centers, so there are four possible stereoisomers of threonine, or two possible diastereomers of L-threonine. However, the name L-threonine is used for one single enantiomer, (2 S ,3 R)-2-amino-3-hydroxybutanoic acid. The second diastereomer (2 S ,3 S), which is rarely present in nature, is called L-allo-threonine. The threonine side chain can undergo O-linked glycosylation. Threonine can become phosphorylated through the action of a threonine kinase. In its phosphorylated form, it is referred to as phosphothreonine. Foods high in threonine are cottage cheese, poultry, fish, meat, lentils, and sesame seeds. Threonine is a secondary marker for citrullinemia type II, an inherited disorder that causes ammonia and other toxic products to accumulate in the blood. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See for details. Source: Wikipedia, Threonine (Wikipedia)

An essential amino acid occurring naturally in the L-form, which is the active form. It is found in eggs, milk, gelatin, cottage cheese, poultry, fish, meat, lentils, sesame seeds and other proteins. Source: National Library of Medicine, MeSH 2006

Threonine is a secondary marker for Citrullinemia type II. Source: Regenstrief LOINC

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Tag Language Translation
zh-CN Chinese (China) 苏氨酸
Synonyms: Beta-羟丁氨酸;Thr;β-羟丁氨酸;羟基丁氨酸
fr-CA French (Canada) Thréonine
et-EE Estonian (Estonia) Treoniin
es-ES Spanish (Spain) Treonina
it-IT Italian (Italy) Treonina
tr-TR Turkish (Turkey) Treonin
ru-RU Russian (Russian Federation) Треонин
nl-NL Dutch (Netherlands) threonine
fr-BE French (Belgium) Thréonine