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HOME > Protocols > Reference Material > Amino acid abbreviations
Common Amino Acid Abbreviations
Name
Symbol
3-Letter
1-Letter
Alanine
Ala
A
Arginine
Arg
R
Asparagine
Asn
N
Aspartic acid
Asp
D
Cysteine
Cys
C
Glutamic Acid
Glu
E
Glutamine
Gln
Q
Glycine
Gly
G
Histidine
His
H
Isoleucine
Ile
I
Leucine
Leu
L
Lysine
Lys
K
Methionine
Met
M
Phenylalanine
Phe
F
Proline
Pro
P
Serine
Ser
S
Threonine
Thr
T
Tryptophan
Trp
W
Tyrosine
Tyr
Y
Valine
Val
V
Unknonwn or "other"
X
Uncommon Amino Acid Abbreviations
Name
Symbol
3-Aminoadipic acid
Aad
2-Aminobutyric acid
Abu
3-Aminopimelic acid
Apm
2,4-Diaminobutyric acid
Dbu
2,2'-Diaminopimelic acid
Dpm
2,3-Diaminopropionic acid
Dpr
N-EthylAA
EtAA
Hydroxylysine
Hyl
allo-Hydroxylysine
aHyl
3-Hydroxyproline
3Hyp
4-Hydroxyproline
4Hyp
allo-Isoleucine
aIle
N-Methylglycine (aka sarcosine)
MeGly or Sar
N-MethylAA
MeAA
Norvaline
Nva
Norleucine
Nle
Ornithine
Orn
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