Symbol 3-letter Meaning Codons ! IUPAC ..
A Ala Alanine GCT GCC GCA GCG ! GCX
B (D/N) Asx Aspartic,
Asparagine ! RAY
C Cys Cysteine TGT TGC ! TGY
D Asp Aspartic GAT GAC ! GAY
E Glu Glutamic GAA GAG ! GAR
F Phe Phenylalanine TTT TTC ! TTY
G Gly Glycine GGT GGC GGA GGG ! GGX
H His Histidine CAT CAC ! CAY
I Ile Isoleucine ATT ATC ATA ! ATH
J ??? No meaning ... ! ...
K Lys Lysine AAA AAG ! AAR
L Leu Leucine TTG TTA CTT CTC CTA CTG ! TTR CTX YTR; YTX
M Met Methionine atg ! ATG
N Asn Asparagine AAT AAC ! AAY
O ??? No meaning ... ! ...
P Pro Proline CCT CCC CCA CCG ! CCX
Q Gln Glutamine CAA CAG ! CAR
R Arg Arginine CGT CGC CGA CGG AGA AGG ! CGX AGR MGR; MGX
S Ser Serine TCT TCC TCA TCG AGT AGC ! TCX AGY; WSX
T Thr Threonine ACT ACC ACA ACG ! ACX
U ??? No meaning ... ! ...
V Val Valine GTT GTC GTA GTG ! GTX
W Trp Tryptophan TGG ! TGG
X Xxx Unknown ! XXX
Y Tyr Tyrosine TAT TAC ! TAY
Z (E/Q) Glx Glutamic,
Glutamine ! SAR
* End Terminator TAA TAG TGA ! TAR TRA; TRR