Amino Acid Single Letter Code

The table below gives:

• The names of the 20 common amino acids

• The corresponding 3 letter abbreviation

• The single letter code for the amino acid


Alanine

Ala

A

Arginine

Arg

R

Asparagine

Asn

N

Aspartic Acid

Asp

D

Cysteine

Cys

C

Glutamine

Gln

Q

Glutamic Acid

Glu

E

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