Fig. 8: The Genetic Code - Codons

 
U
C
A
G
 
U
UUU = Phe
UUC = Phe
UUA = Leu
UUG = Leu
UCU = Ser
UCC = Ser
UCA = Ser
UCG = Ser
UAU = Tyr
UAC = Tyr
UAA = Stop
UAG = Stop
UGU = Cys
UGC = Cys
UGA = Stop
UGG = Trp
U
C
A
G
C
CUU = Leu
CUC = Leu
CUA = Leu
CUG = Leu
CCU = Pro
CCC = Pro
CCA = Pro
CCG = Pro
CAU = His
CAC = His
CAA = Gln
CAG = Gln
CGU = Arg
CGC = Arg
CGA = Arg
CGG = Arg
U
C
A
G
A
AUU = Ile
AUC = Ile
AUA = Ile
AUG = Met
ACU = Thr
ACC = Thr
ACA = Thr
ACG = Thr
AAU = Asn
AAC = Asn
AAA = Lys
AAG = Lys
AGU = Ser
AGC = Ser
AGA = Arg
AGG = Arg
U
C
A
G
G
GUU = Val
CUC = Val
GUA = Val
GUG = Val

GCU = Ala
GCC = Ala
GCA = Ala
GCG = Ala
GAU = Asp
GAC = Asp
GAA = Glu
GAG = Glu
GGU = Gly
GGC = Gly
GGA = Gly
GGG = Gly
U
C
A
G

AUG = start codon
UAA, UAG, and UGA = stop (nonsense) codons

Amino Acids

Phe = phenylalanine
Leu = leucine
Ile = isoleucine
Met = methionine
Val = valine
Ser = serine
Pro = proline
Thr = threonine
Ala = alanine
Tyr = tyrosine
His = histidine
Gln = glutamine
Asn = asparagine
Lys = lysine
Asp = aspartic acid
Glu = glutamic acid
Cys = cysteine
Trp = tryptophan
Arg = arginine
Gly = glycine

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Updated: Feb.9, 1999
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