Empirical data set characteristics.

is mean pairwise nucleotide divergence (substitutions/site, estimated under the single rate codon model), is the number of rates estimated in the GA, are the maximum likelihood estimates for the rates.
*Reference alignments for which GA models were estimated. All GA results presented are for the model with best .
†ATP cone is comprised of highly divergent sequences, with only average pairwise amino-acid identity; synonymous rates appear to be saturated.