One and Three Letter Amino Acid Codes

1 Letter

3 Letter Name Genetic Code

  A

 Ala Alanine GCA, GCC, GCG, GCU 

 C

 Cys Cysteine UGU, UGC 

 D

 Asp Aspartic Acid GAU, GAC

 E

 Glu Glutamic Acid GAU, GAC

 F

 Phe Phenylalanine UUU, UUC 

 G

 Gly Glycine GGU, GGC, GGA, GGG 

 H

His Histidine CAU, CAC 

I

Ile Isoleucine AUU, AUC, AUA 

K

Lys Lysine AAA, AAG 

L

Leu Leucine CUU, CUC, CUA, CUG, UUA, UUG 

M

Met Methionine AUG

N

Asn Asparagine AAU, AAC 

P

Pro Proline CCU, CCC, CCG, CCA

Q

Gln Glutamine CAA, CAG

R

Arg Arginine CGU, CGC, CGA, CGG, AGA, AGG 

S

Ser Serine UCU, UCC, UCA, UCG, AGU, AGC 

T

Thr Threonine ACU, ACC, ACA, ACG

V

Val Valine GUU, GUC, GUA, GUG 

W

Trp Tryptophan UGG 

Y

Tyr Tyrosine UAU, UAC


See also: The Genetic Code