FIGURE 1.

A, breakdown of HuR iCLIP sites based on gene annotations; in line with established patterns of regulation, we see a large proportion of iCLIP sites in 3′-UTRs, although we also, unexpectedly, observe many intronic sites. B, the percentage of expressed genes for which we observe at least one non-intronic iCLIP site (left) and percentage of genes identified as differentially expressed in which we observe at least one non-intronic iCLIP site (right). C, Gene Ontology analysis of HuR target genes containing two or more iCLIP sites in the 3′-UTR. er, endoplasmic reticulum; ubl, ubiquitin-like modifier protein.