Figure 2From: Nucleosome rotational setting is associated with transcriptional regulation in promoters of tissue-specific human genesCpG islands separate transcription start sites with and without the 10-bp RR periodic signal. (a, b) The 9,622 TSSs associated with a CpG island show a clear periodic signal (a) that translates into a strong and specific 10-bp periodic signal after DFT analysis (b). (c, d) In contrast, the 3,978 TSSs without CpG islands do not display an obvious periodic pattern (c), with no associated distinctive signal after DFT analysis (d).Back to article page