Synonymous substitution ratesa of individual ectodomains of anole protocadherin subcluster genes.

aAverage synonymous substitution per codon (dS) for each branch in the gene tree of individual subgroups was calculated based on the alignment of paralogs in the subgroup.bThe ratio of the average dS per branch calculated based on alignment of the most divergent (dSECDhigh) and the least divergent (dSECDlow) ectodomains in each protocadherin subgroup.