Figure 4
From: Sequence features responsible for intron retention in human
Expression breadth (number of tissues in which a gene is expressed) of intron retaining genes. Breadth was determined by SAGE tag counts for genes with intron retention (961 low-RIF genes, 199 high-RIF genes), all genes in the database used in this analysis (15953) and 255 out of 575 housekeeping genes (determined by [23] with microarray data). Genes presenting intron retention are more frequently broadly expressed in comparison to all genes (background distribution).