Mean percent sequence divergence between successfully enriched targets and reference sequence used to develop enrichment probes.

<p>Target exon sequences were based on the <i>Xenopus tropicalis</i> reference genome. Species were not enriched for all exons. To estimate whether more conserved exons were more likely to be enriched, distance calculations between <i>X. tropicalis</i> and <i>X. laevis</i> were made for each target exon enriched for a given species and for each target exon that failed to enrich for that species. Standard errors are given in parentheses.