Association of ORC1 sites with RNA-seq tags and functional TSSs. Pie diagram showing numbers and percentages of ORC1 peaks overlapping, or not, with HeLa RNA-seq tags (RNA-seq⁺ or RNA-Seq⁻), or with TSSs identified in the TSS-seq data set (TSS-seq⁺ or TSS-seq⁻) (Yamashita et al. 2011) or in the RefSeq/UCSC data set (TSS-RefSeq⁺ or TSS-RefSeq⁻). TSS-seq⁺ peaks can be associated, or not, with annotated TSS (TSS-RefSeq^±): Among the 7624 RNA-seq⁺/TSS-RefSeq⁺, 4377 are TSS-RefSeq⁺ and 3247 TSS-RefSeq⁻; among the 1169 RNA-seq⁻/TSS-seq⁺, 138 are TSS-RefSeq⁺ and 1031 TSS-RefSeq⁻.