L-phenylalanine

Phenylalanine
Names
L-Phenylalanine
L-Phenylalanine at physiological pH
3D phenylalanine model
IUPAC name (S)-2-Amino-3-phenylpropanoic acid
Identifiers
CAS Number	150-30-1 (DL)^Y 63-91-2 (L)^Y
ChEBI	CHEBI:58095^Y
ChEMBL	ChEMBL301523^Y
ChemSpider	5910^Y
DrugBank	DB00120^N
ECHA InfoCard	100.000.517
IUPHAR/BPS	3313
KEGG	D00021^Y
PubChem	994
UNII	8P946UF12S^Y
InChI InChI=1S/C9H11NO2/c10-8(9(11)12)6-7-4-2-1-3-5-7/h1-5,8H,6,10H2,(H,11,12)/t8-/m0/s1^Y Key: COLNVLDHVKWLRT-QMMMGPOBSA-N^Y InChI=1/C9H11NO2/c10-8(9(11)12)6-7-4-2-1-3-5-7/h1-5,8H,6,10H2,(H,11,12)/t8-/m0/s1 Key: COLNVLDHVKWLRT-QMMMGPOBBC
Properties
Chemical formula	C₉H₁₁NO₂
Molar mass	165.19 g/mol
Acidity (pK_a)	1.83 (carboxyl), 9.13 (amino)
Hazards
Safety data sheet	See: data page
NFPA 704	1 2 0
Supplementary data page
Structure and properties	Refractive index (n), Dielectric constant (ε_r), etc.
Thermodynamic data	Phase behaviour solid–liquid–gas
Spectral data	UV, IR, NMR, MS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N (what is ^YN ?)
Infobox references

Phenylalanine (US: /ˌfɛnəlˈæləniːn/, UK: /ˌfiːnaɪlˈæləniːn/; abbreviated as Phe or F) is an α-amino acid with the formula C
9H
11NO
2. It can be viewed as a benzyl group substituted for the methyl group of alanine, or a phenyl group in place of a terminal hydrogen of alanine. This essential amino acid is classified as neutral, and nonpolar because of the inert and hydrophobic nature of the benzyl side chain. The L-isomer is used to biochemically form proteins, coded for by DNA. The codons for L-phenylalanine are UUU and UUC. Phenylalanine is a precursor for tyrosine; the monoamine neurotransmitters dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline); and the skin pigment melanin.