Figure 2.

Accelerated exonic evolution in a previously determined set of genes. Three sets of genes previously reported to be evolving under positive, negative and neutral selective regimes were compared for rates of differences in their exons and their adjacent introns. Each point in the plots represents the values (exonic divergence and intronic divergence) computed for each exon/intron pair. A circle indicates exons with a statistically higher rate of substitutions relative to their corresponding intron.