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Table 2 Range of applicability. Ratios of likelihood scores for amino acid and codon based alignments for orthologs between several species pairs, where N is the number of orthologs used.

From: Empirical codon substitution matrix

  N Avg. PAM Scores ratio
Homo sapiens
vs. Mus musculus 14655 17.4 1.150
vs. Gallus gallus 9272 29.3 1.060
vs. X. tropicalis 9953 39.1 1.026
vs. B. rerio 7507 43.7 1.013
Drosophila melanogaster
vs. A. gambiae 5059 57.3 .995
vs. H. sapiens 3371 77.5 .959
vs. C. elegans 2156 88.8 .945
Saccharomyces cerevisiae
vs. C. glabrata 3467 52.7 1.002
vs. A. gossypii 2909 61.4 .978
vs. H. sapiens 1187 94.1 .931
Escherichia coli
vs. E. coli strain O6 3156 2.0 1.323
vs. Salmonella typhi 2557 14.2 1.067
vs. P. aeruginosa 1234 71.6 .980
vs. B. japonicum 765 90.2 .959