Fig. 2From: Stable intronic sequence RNAs (sisRNAs) are selected regions in introns with distinct propertiessisRNAs are highly expressed from genes with multiple introns. a-b Histograms show (a) the percentage of genes with sisRNAs, and (b) the average number of sisRNAs per gene in refSeq (red) and Ensembl (blue) genes. Genes are grouped by the intron number. The dashed line indicates the average value for all genesBack to article page