Codon Table

Below is the genetic code represented in tabular format. Each codon is comprised of 3 nucleotides (eg AAA) corresponding to a single amino acid, represented here in single and three letter format.

All codons and their respective amino acids are colored based upon the class of amino acid.

Nonpolar Polar Basic Acidic Aromatic Stop Codon
1st Base 2nd Base 3rd Base
T C A G
T TTT F Phe TCT S Ser TAT Y Tyr TGT C Cys T
TTC F Phe TCC S Ser TAC Y Tyr TGC C Cys C
TTA L Leu TCA S Ser TAA * Stop TGA * Stop A
TTG L Leu TCG S Ser TAG * Stop TGG W Trp G
C CTT L Leu CCT P Pro CAT H His CGT R Arg T
CTC L Leu CCC P Pro CAC H His CGC R Arg C
CTA L Leu CCA P Pro CAA Q Gln CGA R Arg A
CTG L Leu CCG P Pro CAG Q Gln CGG R Arg G
A ATT I Ile ACT T Thr AAT N Asn AGT S Ser T
ATC I Ile ACC T Thr AAC N Asn AGC S Ser C
ATA I Ile ACA T Thr AAA K Lys AGA R Arg A
ATG M Met ACG T Thr AAG K Lys AGG R Arg G
G GTT V Val GCT A Ala GAT D Asp GGT G Gly T
GTC V Val GCC A Ala GAC D Asp GGC G Gly C
GTA V Val GCA A Ala GAA E Glu GGA G Gly A
GTG V Val GCG A Ala GAG E Glu GGG G Gly G


The codon ATG serves both as the translation initiation site and codes for Methionine.


© 2008-2022 Greg Cope