Immunology

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SHORTHAND SYMBOLS FOR AMINO ACIDS

[1-letter symbols are commonly used in sequence data]
One letter

Three letter

Amino Acid

A

Ala

Alanine

R

Arg

Arginine

N

Asn

Asparagine

D

Asp

Aspartic acid

B

Asx

Asn or Asp

C

Cys

Cysteine

Q

Gln

Glutamine

E

Glu

Glutamic acid

Z

Glx

Gln or Glu

G

Gly

Glycine

H

His

Histidine

I

Ile

Isoleucine

L

Leu

Leucine

K

Lys

Lysine

M

Met

Methionine

F

Phe

Phenylalanine

P

Pro

Proline

S

Ser

Serine

T

Thr

Threonine

W

Trp

Tryptophan

Y

Tyr

Tyrosine

V

Val

Valine

Amino acids with nonpolar [hydrophobic] groups

Amino acids with uncharged polar groups [pH = 6-7]

Amino acids with acidic groups
[pH = 6-7]

Amino acids with basic groups
[pH = 6-7]





Ala
Asn
Asp
Arg
Ile
Cys
Glu
His
Leu
Gly

Lys
Met
Gln

Phe
Ser

Pro
Thr

Trp

Val

.

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 Updated 8/27/04 by thatcher@sonoma.edu