Figure 5
From: Differentiated evolutionary rates in alternative exons and the implications for splicing regulation
Variation of the (a) synonymous (dS) and (b) non-synonymous (dN) substitution rates for alternative CES and non-CES exons (y-axis) with the EST inclusion level (x-axis). Each average and standard error is calculated for a minimum EST-inclusion expressed as the fraction of ESTs that include the alternative exon. For comparison, we have superimposed the average synonymous rate for all constitutive CES and non-CES exons as a straight line with the corresponding error bars.