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. 2016 Apr 7;44(8):3481–3494. doi: 10.1093/nar/gkw190

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© The Author(s) 2016. Published by Oxford University Press on behalf of Nucleic Acids Research.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 6. — Occurrence of G-register exchange in predicted human guanine quadruplex sequences. Black bars show the number of putative GQ sequences identified in a database of human promoter regions (36) (28 377 putative GQ sequences in total) with a given GR isomer multiplicity. White bars show the number of sequences that would be expected to have a given GR isomer multiplicity if G-tracts containing 3, 4, and 5 consecutive dG residues are distributed randomly within GQ sequences. The inset shows the number G-tracts from the putative GQ sequences that contain 3, 4, and 5 consecutive dG residues.