CS 3824: Genetic Code

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Second Position of Codon
T C A G
F
i
r
s
t
 
P
o
s
i
t
i
o
n
 T
TTT Phenylalanine (Phe) [F]
TTC
TTA Leucine (Leu) [L]
TTG
TCT Serine (Ser) [S]
TCC
TCA
TCG
TAT Tyrosine (Tyr) [Y]
TAC
TAA Stop (Ter) [end]
TAG
TGT Cysteine (Cys) [C]
TGC
TGA Stop (Ter) [end]
TGG Tryptophan (Trp) [W]
T
C
A
G
T
h
i
r
d
 
P
o
s
i
t
i
o
n
C
CTT Leucine (Leu) [L]
CTC
CTA
CTG
CCT Proline (Pro) [P]
CCC
CCA
CCG
CAT Histidine (His) [H]
CAC
CAA Glutamine (Gln) [Q]
CAG
CGT Arginine (Arg) [R]
CGC
CGA
CGG
T
C
A
G
A
ATT Isoleucine (Ile) [I]
ATC
ATA
ATG Methionine (Met) [M]
ACT Threonine (Thr) [T]
ACC
ACA
ACG
AAT Asparagine (Asn) [N]
AAC
AAA Lysine (Lys) [K]
AAG
AGT Serine (Ser) [S]
AGC
AGA Arginine (Arg) [R]
AGG
T
C
A
G
G
GTT Valine (Val) [V]
GTC
GTA
GTG
GCT Alanine (Ala) [A]
GCC
GCA
GCG
GAT Aspartic Acid (Asp) [D]
GAC
GAA Glutamic Acid (Glu) [E]
GAG
GGT Glycine (Gly) [G]
GGC
GGA
GGG
T
C
A
G

 

NOTES:

  1. All 64 three-letter codons have a unique meaning. For most (e.g., TTG), the meaning is the amino acid (Leucine) given to the right of the codon in the table. For each amino acid, its three-letter abbreviation is given in parentheses (Leu) and its 1-letter abbreviation in square brackets [L].

    There are also three Stop codons: TAA, TAG, and TGA.

  2. A number of the amino acids and their codons are color coded to help distinguish the correspondence.