Abundance of APA in
tissues. A finalized list of genes with mapped 3’UTR isoforms was generated for each tissue and used to compare the abundance of 3’UTR isoforms between tissues. (A) Proportion of genes subject to alternative polyadenylation in each tissue. The intestine expressed significantly more genes containing more than one 3’UTR isoform, while the muscle tissues expressed similar proportions of genes with more than one 3’UTR isoform. (B) The average number of 3’UTR isoforms detected for each gene/tissue. The number of genes and isoforms (frequency) are displayed in each column (left x-axis). We calculated and displayed the change in 3’UTR isoform to gene ratio (right x-axis) between each tissue (green trend line). We detected slightly more APA in the intestine and pharynx, when compared with the body muscle tissue.