THE GENETIC CODE The periodic table of DNA All 64 codons → 20 amino acids. Read a codon (mRNA; DNA template pairs T↔A). Colored by amino-acid chemistry. Hover a codon. AUG starts translation; UAA/UAG/UGA stop it.
UUU F Phe
UCU S Ser
UAU Y Tyr
UGU C Cys
UUC F Phe
UCC S Ser
UAC Y Tyr
UGC C Cys
UUA L Leu
UCA S Ser
UAA ■ Stop
UGA ■ Stop
UUG L Leu
UCG S Ser
UAG ■ Stop
UGG W Trp
CUU L Leu
CCU P Pro
CAU H His
CGU R Arg
CUC L Leu
CCC P Pro
CAC H His
CGC R Arg
CUA L Leu
CCA P Pro
CAA Q Gln
CGA R Arg
CUG L Leu
CCG P Pro
CAG Q Gln
CGG R Arg
AUU I Ile
ACU T Thr
AAU N Asn
AGU S Ser
AUC I Ile
ACC T Thr
AAC N Asn
AGC S Ser
AUA I Ile
ACA T Thr
AAA K Lys
AGA R Arg
AUG M Met
ACG T Thr
AAG K Lys
AGG R Arg
GUU V Val
GCU A Ala
GAU D Asp
GGU G Gly
GUC V Val
GCC A Ala
GAC D Asp
GGC G Gly
GUA V Val
GCA A Ala
GAA E Glu
GGA G Gly
GUG V Val
GCG A Ala
GAG E Glu
GGG G Gly
The standard genetic code. mRNA codons shown (U); the DNA coding strand uses T. The closest thing biology has to chemistry's periodic table.