Threonine (Threonine) in 1935 by the United States, Illinois (Illinois) in Rose's qroup (M- cCoy et al., 1935) were isolated from the blood fibrin out, but proved to be not grown on mouse lack of amino acids.
Threonine is part of an aliphatic amino acid, the chemical name for α-amino-β-hydroxybutyric acid, serine approximation in the structure (Serine Both are having a hydroxyl group (Hydroxyl qroup), so that the acid hydrolysis process vulnerable to localized damage, it is very unstable in alkaline solution. Threonine has two partial carbon atom, and thus be able to show the presence of (L-, D-, L-allo and D-allo) four stereoisomeric forms. But only L- threonine mice have validity (West and Carter, 1938) biology, but also only such isomers exist in the natural plant and animal proteins. In rat liver threonine and serine dehydration enzyme only commonality (Goldstein et al., 1962), but also highly induced (Inoue et al., 1971 Bird and Nunn (1983) have demonstrated, usually in the order after the feeding Segment, the animals too much threonine mostly decomposed by threonine dehydrogenation enzymes in gluconeogenesis when the stage is playing a major role by the enzyme threonine dehydration. Threonine protein in the body is to maintain a balance of essential amino acids, it is for collagen, elastin synthesis, as well as to keep teeth gloss is quite important.
When threonine and aspartate and methionine binding, it could help the liver function and lipotropic effect.
In the heart, the central nervous system and skeletal muscle was found threonine, synthetic glycine and serine precursors, threonine also help reduce fatty acid generated in the liver.
It can be manufactured antibodies and help strengthen the immune system, on the part of the treatment of depression is also helpful.
Because threonine content in the grains in small, so vegetarians lack threonine situation occurs more easily than non-vegetarians.