Amino Acid Encoded, Including the Property and Formula of Its Side Chain  mRNA Codon  % of Each Base for mRNA Codons with 1  3 Synonyms  
1^{st} Position (Left)  2^{nd }Position (Middle)  3^{rd} Position (Right)  1^{st} and 2^{nd} Positions  All Three Positions  
Methionine (Met) Translation Start Codon hydrophobic CH_{2}CH_{2}SCH_{3}  AUG 
% of A 12/32 = 37.5%
% of U 12/32 = 37.5%
% of G 4/32 = 12.5%
% of C 4/32 = 12.5%

% of A 16/32 = 50%
% of U 8/32 = 25%
% of G 8/32 = 25%
% of C 0/32 = 0%

% of A 8/32 = 25%
% of U 8/32 = 25%
% of G 8/32 = 25%
% of C 8/32 = 25%

% of A 28/64 = 43.8%
% of U 20/64 = 31.2%
% of G 12/64 = 18.8%
% of C 4/64 = 6.2%

% of A 36/96 = 37.5%
% of U 28/96 = 29.2%
% of G 20/96 = 20.8%
% of C 12/96 = 12.5%

Tryptophan (Trp) hydrophobic CH_{2}C_{8}H_{6}N  UGG  
Lysine (Lys) positively charged ${\text{CH}}_{2}{\text{CH}}_{2}{\text{CH}}_{2}{\text{CH}}_{2}{\text{NH}}_{3}^{+}$  AAA AAG  
Asparagine (Asn) polar CH_{2}CONH_{2}  AAU AAC  
Arginine (Arg) positively charged ${\text{CH}}_{2}{\text{CH}}_{2}{\text{CH}}_{2}\text{NHC}{\left({\text{NH}}_{2}\right)}_{2}^{+}$  AGA AGG  
Serine (Ser) polar CH_{2}OH  AGU AGC  
Tyrosine (Tyr) polar CH_{2}C_{6}H_{4}OH  UAU UAC  
Leucine (Leu) hydrophobic CH_{2}CH(CH_{3})_{2}  UUA UUG  
Phenylalanine (Phe) hydrophobic CH_{2}C_{6}H_{5}  UUU UUC  
Cysteine (Cys) polar CH_{2}SH  UGU UGC  
Glutamic Acid (Glu) negatively charged CH_{2}CH_{2}COO^{−}  GAA GAG  
Aspartic Acid (Asp) negatively charged CH_{2}COO^{−}  GAU GAC  
Glutamine (Gln) polar CH_{2}CH_{2}CONH_{2}  CAA CAG  
Histidine (His) polar/positively charged CH_{2}C_{3}H_{3}N_{2}  CAU CAC  
Isoleucine (Ile) hydrophobic CH(CH_{3})(CH_{2}CH_{3})  AUA AUU AUC  
Translation Stop Codon  UAA UAG UGA 