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Codon Chart

A reference codon chart for the three-letter RNA codes and their corresponding amino acids. Below are the nucleotides and their abbreviations, followed by amino acids and their full name, three letter code, and single letter abbreviations. 

  2nd position        
1st position U C A G 3rd position
U Phe Ser Tyr Cys U
U Phe Ser Tyr Cys C
U Leu Ser stop stop A
U Leu Ser stop Trp G
C Leu Pro His Arg U
C Leu Pro His Arg C
C Leu Pro Gln Arg A
C Leu Pro Gln Arg G
A Ile Thr Asn Ser U
A Ile Thr Asn Ser C
A Ile Thr Lys Arg A
A Met Thr Lys Arg G
G Val Ala Asp Gly U
G Val Ala Asp Gly C
G Val Ala Glu Gly A
G Val Ala Glu Gly G
Nucleotide Abbreviations  
A Adenine
G Guanin
C Cytosine
T Thymine
U Uracil
Amino Acid Abbreviations    
Alanine Ala A
Asparagine Asn N
Aspartic acid Asp D
Arginine Arg R
Cysteine Cys C
Glutamic Acid Glu E
Glutamine Gln Q
Glycine Gly G
Histidine His H
Isoleucine Ile I
Lysine Lys K
Leucine Leu L
Methionine Met M
Phenylalanine Phe F
Proline Pro P
Serine Ser S
Threonine Thr T
Tryptophan Trp W
Tyrosine Tyr Y
Valine Val V

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