Valine

Valine
Skeletal formula of neutral valine	Zwitterionic valine
Ball-and-stick model	Space-filling model
Names
	IUPAC name Valine
	Other names 2-Amino-3-methylbutanoic acid; 2-Aminoisovaleric acid; Valic acid
Identifiers
CAS Number	L: 72-18-4 ; D/L: 516-06-3 ; D: 640-68-6 ;
3D model (JSmol)	L: Interactive image; L Zwitterion: Interactive image;
ChEBI	L: CHEBI:16414 ;
ChEMBL	L: ChEMBL43068 ;
ChemSpider	L: 6050 ; D/L: 1148 ; D: 64635 ;
DrugBank	L: DB00161 ;
ECHA InfoCard	100.000.703
EC Number	L: 200-773-6;
IUPHAR/BPS	L: 4794;
KEGG	L: D00039 ;
PubChem CID	L: 6287; D/L: 1182; D: 71563;
UNII	L: HG18B9YRS7 ; D/L: 4CA13A832H ; D: Y14I1443UR ;
CompTox Dashboard (EPA)	L: DTXSID40883233 ;
	InChI InChI=1S/C5H11NO2/c1-3(2)4(6)5(7)8/h3-4H,6H2,1-2H3,(H,7,8)/t4-/m0/s1 Key: KZSNJWFQEVHDMF-BYPYZUCNSA-N ; D/L: Key: KZSNJWFQEVHDMF-UHFFFAOYSA-N; D: Key: KZSNJWFQEVHDMF-SCSAIBSYSA-N;
	SMILES L: CC(C)[C@@H](C(=O)O)N; L Zwitterion: CC(C)[C@@H](C(=O)[O-])[NH3+];
Properties
Chemical formula	C5H11NO2
Molar mass	117.148 g·mol−1
Density	1.316 g/cm3
Melting point	298 °C (568 °F; 571 K) (decomposition)
Solubility in water	soluble, 85 g/L
Acidity (pKa)	2.32 (carboxyl), 9.62 (amino)
Magnetic susceptibility (χ)	-74.3·10−6 cm3/mol
Supplementary data page
	Valine (data page)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Valine (symbol Val or V) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated −NH₃⁺ form under biological conditions), an α-carboxylic acid group (which is in the deprotonated −COO⁻ form under biological conditions), and a side chain isopropyl group, making it a non-polar aliphatic amino acid. Valine is essential in humans, meaning the body cannot synthesize it; it must be obtained from dietary sources which are foods that contain proteins, such as meats, dairy products, soy products, beans and legumes. It is encoded by all codons starting with GU (GUU, GUC, GUA, and GUG).

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