Fig. 3
From: Benchmarking sequencing methods and tools that facilitate the study of alternative polyadenylation
Features of PAS sites. a Barplot showing the percentage of PAS sites annotated in the PolyA_DB 3 database [47]. b Cumulative density of the number of identified PAS sites identified. c Barplot representing the genic location—3′ and 5′ UTRs, introns, exons, and intergenic regions—of PAS sites as defined by HOMER [48] (left), and the genomic locations of PAS sites defined using ChromHMM annotations [49] (right). For the latter, the four annotations represented are enhancer, promoter, repressed, and transcription (txn) elongation. Eleven other annotations were collapsed together as "Other" (see the “Methods” section)