The histograms show frequencies of transcription start sites (TSS) captured by CAGE

Top and bottom panels show CAGE tag-defined TSS mapping to forward and reverse strand, respectively. The shaded grey box indicates the region with potential for forming a dsRNA by transcription on both strands. The location of the small RNA cluster inside this region is indicated in the central panel as a white box. The numbering of genomic nucleotides is assigned by defining the center of the small RNA cluster as +1.<p><b>Copyright information:</b></p><p>Taken from "Hidden layers of human small RNAs"</p><p>http://www.biomedcentral.com/1471-2164/9/157</p><p>BMC Genomics 2008;9():157-157.</p><p>Published online 10 Apr 2008</p><p>PMCID:PMC2359750.</p><p>