Table 4.

Preferred and avoided amino acid-nucleotide pairs in different organisms

Organism	Prefered	Avoided
E. coli	Gly-C, Ala-C, Ser-C, Tyr-C, Asn-C, Leu-C	Tyr-A, Phe-C, Met-C, Pro-U, Thr-U, Gln-U
H. sapiens	Val-A, Cys-A, Trp-G, His-U	Glu-A, Asn-G, Lys-G, Phe-C, Ser-c, Thr-C, Asp-C, Val-U, Leu-U, Ser-U
S. cerevisiae	Tyr-A, Gln-A, Met-G, Phe-C, Met-C, Thr-C, Phe-U	Leu-A, Gly-G, Arg-G
Thermophiles	Val-C, Leu-C, Ile-C, Trp-C, Trp-U	Ala-A, Val-A, Gln-A, Asp-G, Phe-C, Met-C, Ser-C, Ala-U, Phe-U, Ser-U, Asn-U, Asp-U
Archaea	Trp-A, Lys-A, Ala-G, Val-G, Ile-G, Pro-C, Ile-U, Met-U, Ser-U, Cys-U, Glu-U	Leu-A, Phe-A, Gln-G, Ala-C, Leu-C, Ile-C, Met-C, Thr-C, Tyr-C, Asn-C, Phe-U