Figure 2From: Correlated evolution of nucleotide substitution rates and allelic variation in Mhc-DRB lineages of primatesConsistent within-species (a) and within-lineage (b) variations in non-synonymous nucleotide substitution rates at the contact residues of the antigen binding sites. Columns are means, bars indicate standard errors. (a) Names are the four-letter abbreviations used for species names [27], and (b) lineage names.Back to article page