The Genetic Code


Second Position
First
Position
(5' end)
U C A G
Third
Position
(3' end)
U UUU
UUC
Phe UCU
UCC
Ser UAU
UAC
Tyr UGU
UGC
Cys
U
C

A
G
UUA
UUG
Leu UCA
UCG
UAA
UAG
Stop
Stop
UGA
UGG
Stop
Trp
C CUU
CUC
Leu CCU
CCC
Pro CAU
CAC
His CGU
CGC
Arg
U
C

A
G
CUA
CUG
CCA
CCG
CAA
CAG
Gln CGA
CGG
A AUU
AUC
AUA
Ile ACU
ACC
Thr AAU
AAC
Asn AGU
AGC
Ser
U
C

A
G
AUG Met ACA
ACG
AAA
AAG
Lys AGA
AGG
Arg
G GUU
GUC
Val GCU
GCC
Ala GAU
GAC
Asp GGU
GGC
Gly
U
C

A
G
GUA
GUG
GCA
GCG
GAA
GAG
Glu GGA
GGG
Termination Signals Single Letter Code
UAA (Ochre)
UAG (Amber)
UGA (Opal
A = adenosine
C = cytidine
G = guanosine
T = thymidine
B = C or G or T
D = A or G or T
H = A or C or T
K = G or T
M = A or C
N = A or C or G or T
R = A or G
S = C or G
V = A or C or G
W = A or T
Y = C or T