Threonine (Thr or T) is an amino acid present in proteins.
Structure of threonine
Like all of the amino acids, threonine is formed from the COOH group and the NH2group which are involved in peptide bonds. It has a branched side chain: CH(OH)CH3. It is a polar amino acid.
Function of threonine
Threonine is an essential amino acid which is not produced by the body and must therefore be obtained from the diet (white cheese, poultry, meat, fish, seeds).
Threonine can be glycosylated and phosphorylated.
Threonine is an essential amino acid. © Ben Mills, Wikimedia, public domain