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. 2009 Dec 2;38(4):1182–1194. doi: 10.1093/nar/gkp1065

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© The Author(s) 2009. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 8. — Negative-stain electron microscopy of NorRΔGAF in complex with 266 bp dsDNA, containing all three enhancer sites. (A) Raw micrographs of NorRΔGAF in complex with 21 bp NorR1 (right panel) or 66 bp NorR123 (left panel) DNA fragments. Scale bar 90 nm. (B) Top, raw micrograph of NorRΔGAF in complex with 266 bp dsDNA, with arrows showing some of the higher order oligomers. Scale bar 90 nm. Bottom, gallery of picked particles. Scale bar 15 nm. (C) Selected class averages of 7–10 particles per class generated from 5000 particles show ring-shaped particles with a diameter of 126 Å. Scale bar 11 nm.