FIGURE 5.

Motifs enriched in chromosomes without lncRNAs. Sequence logos indicate motifs significantly enriched in either the upstream or downstream noncoding regions of chromosomes for which our survey found no corresponding lncRNAs. Vertical bars indicate the median position of each motif within the respective noncoding region. If these motifs cause RNA polymerase to terminate transcription before reaching the end of a chromosome, it would result in templates that lack telomeres on both ends. Our RNA-seq pipeline would not detect such RNAs unless they contain an internal telomeric sequence.