Amino Acid (AA) Symbols and Abbrevations
Amino acid is the smallest unit of protein and is an organic molecule made up of amine and carboxylic acid functional groups. An amino acid is composed of nitrogen, carbon, oxygen, and hydrogen molecules.

Table: List of amino acids (AA) and their symbols and abbrevations.

 
Amino acid
Abbreviation
Symbol
 
Phenylalanine
Phe
F
 
Leu
L
 
Serine
Ser
S
 
Tyrosine
Tyr
Y
 
Cysteine
Cys
C
 
Trp
W
 
Leucine
Leu
L
 
Proline
Pro
P
 
Histidine
His
H
 
Glutamine
Gln
Q
 
Arg
R
 
Isoleucine
Ile
I
 
Methionine
Met
M
 
Threonine
Thr
T
 
Asparagine
Asn
N
 
Lysine
Lys
K
 
Serine
Ser
S
 
Arginine
Arg
R
 
Valine
Val
V
 
Alanine
Ala
A
 
Aspartate
Asp
D
 
Glutamate
Glu
E
 
Glycine
Gly
G


Amino Acid Content in Foods
Arginine Tryptophan
Leucine  
Amino acid symbols  
Essential amino acids Non-Essential amino acids


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Last Updated ( Saturday, 01 September 2007 )