Codon table: Difference between revisions
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Codon tables describe how the triplet codon of RNA (or DNA) is read by specific tRNAs to map to a particular [[Amino acids|amino acid]]. Many organisms use the Standard Codon Table, shown below. | Codon tables describe how the triplet codon of RNA (or DNA) is read by specific tRNAs to map to a particular [[Amino acids|amino acid]]. Many organisms use the Standard Codon Table, shown below. | ||
Comprehensive information about codon usage in different organisms can be found at the [http://www.ncbi.nlm.nih.gov/Taxonomy/Utils/wprintgc.cgi NCBI Taxonomy site] | |||
==Standard Codon table== | ==Standard Codon table== |
Revision as of 08:30, 25 July 2008
Codon tables describe how the triplet codon of RNA (or DNA) is read by specific tRNAs to map to a particular amino acid. Many organisms use the Standard Codon Table, shown below.
Comprehensive information about codon usage in different organisms can be found at the NCBI Taxonomy site
Standard Codon table
T | C | A | G | |
---|---|---|---|---|
T |
TTT Phe F Phenylalanine |
TCT Ser S Serine |
TAT Tyr Y Tyrosine |
TGT Cys C Cysteine |
C |
CTT Leu L Leucine |
CCT Pro P Proline |
CAT His H Histidine |
CGT Arg R Arginine |
A |
ATT Ile I Isoleucine |
ACT Thr T Threonine |
AAT Asn N Asparagine |
AGT Ser S Serine |
G |
GTT Val V Valine |
GCT Ala A Alanine |
GAT Asp D Aspartic acid |
GGT Gly G Glycine |
1The codon ATG both codes for methionine and serves as an initiation site: the first ATG in an mRNA's coding region is where translation into protein begins.
2UGA can also code for selenomethionine: the twenty-first amino acid, discovered in 1986.
3UAG can also code for pyrrolysine: the twenty-second amino acid, discovered in 2002.