Threonine

Threonine
	; Skeletal formula of L-threonine
Ball-and-stick model Ball-and-stick model	Space-filling model Space-filling model
Names
	IUPAC name Threonine
	Other names 2-Amino-3-hydroxybutanoic acid
Identifiers
CAS Number	80-68-2 ; 72-19-5 (L-isomer) ;
3D model (JSmol)	Interactive image; Zwitterion: Interactive image;
ChEBI	CHEBI:57926 ;
ChEMBL	ChEMBL291747 ;
ChemSpider	6051 ;
DrugBank	DB00156 ;
ECHA InfoCard	100.000.704
EC Number	201-300-6;
IUPHAR/BPS	4785;
PubChem CID	6288;
UNII	TFM6DU5S6A ; 2ZD004190S (L-isomer) ;
CompTox Dashboard (EPA)	DTXSID70893087 DTXSID2046412, DTXSID70893087 ;
	SMILES C[C@H]([C@@H](C(=O)O)N)O; Zwitterion: C[C@H]([C@@H](C(=O)[O-])[NH3+])O;
Properties
Chemical formula	C4H9NO3
Molar mass	119.12 g·mol−1
Solubility in water	(H2O, g/dl) 10.6(30°),14.1(52°),19.0(61°)
Acidity (pKa)	2.63 (carboxyl), 10.43 (amino)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Threonine (symbol Thr or T)^[2] is an amino acid that is used in the biosynthesis of proteins.

History

Threonine was discovered in 1936 by William Cumming Rose and Curtis Meyer.^[3]

↑ Dawson, R.M.C., et al., Data for Biochemical Research, Oxford, Clarendon Press, 1959.
↑ "Nomenclature and Symbolism for Amino Acids and Peptides". IUPAC-IUB Joint Commission on Biochemical Nomenclature. 1983. Archived from the original on 9 October 2008. Retrieved 5 March 2018.
↑ A Dictionary of scientists. Daintith, John., Gjertsen, Derek. Oxford: Oxford University Press. 1999. p. 459. ISBN 9780192800862. OCLC 44963215.{{cite book}}: CS1 maint: others (link)

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