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. 2012 Jul 26;8(7):e1002841. doi: 10.1371/journal.pgen.1002841

Figure 3. Rodent conserved intergenic lncRNA loci and promoter sequences exhibit constraint.

Figure 3

Normalised nucleotide substitution rates for (A) 160 intergenic lncRNA loci conserved in rodents (expressed in Mmus, Mcas and Rnor) and 108 Mus genus specific intergenic lncRNA loci; and (B) 159 putative intergenic lncRNA promoters conserved in rodents and 104 Mus genus specific intergenic lncRNA putative promoters. Putative proximal intergenic lncRNA promoters were defined as the 400 bp upstream region of the predicted TSS. Yellow dashed line represents the expected neutral substitution rate. Compared to neutral sequence (ancestral repeats, AR) in the vicinity, nucleotide substitution rates differ significantly for loci and promoter of intergenic lncRNA transcripts conserved in rodents (as indicated by asterisks ***, p<0.001) and the promoters of Mus genus specific intergenic lncRNAs (***, p<0.001).