Extended 3′ UTRs have characteristics of long noncoding RNAs. (A) Length distribution of 3′ UTR extensions, lincRNAs, protein coding transcripts, and pri-miRNAs. (B) Coding potential assessment of 3′ UTR extensions, lincRNAs, protein coding transcripts, and pri-miRNAs. Transcripts with higher coding potential have higher CPC scores. (C) Cumulative distribution of the longest ORF length across 3′ UTR extensions, lincRNAs, protein coding transcripts, and pri-miRNAs. (D) Cumulative distribution of expression levels (FPKMs) across 3′ UTR extensions, lincRNAs, protein coding transcripts, and pri-miRNAs. The fold changes of median expression levels for protein coding transcripts relative to 3′ UTR extensions (bottom), pri-miRNAs (middle), and lincRNAs (top) are shown.
