Science Fair Project Encyclopedia
Threonine contains two chiral centers, so there are four possible stereoisomers of threonine. It means that there are two possible diastereomers of L-threonine. However, name L-threonine is used for one single enantiomer, (2S,3R)-2-amino-3-hydroxybutanoic acid. The second diastereomer (2S,3S), which is present nature rather rarely, is called L-allo-threonine.
The threonine side chain can undergo O-linked glycosylation.
Foods high in threonine are cottage cheese, poultry, fish, meat, lentils, and sesame seeds.
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