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. 2007 Aug 17;35(16):e106. doi: 10.1093/nar/gkm560

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© 2007 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 6. — Loops of hexa- and octanucleosomes with different β combinations. (A and B) Hexanucleosomal loops formed by β = 0°, ±90° and 180° (0, +, −, 5). Arrows indicate the direction of the filament from nucleosome No. 1→6. The flat faces of the core particles nearest to the entering linkers are dark while the faces nearest to the exiting linkers are light. The line diagrams show the orientation of the five linkers in each loop. (A1–3) Closed loops; (B1–4) locked loops. (C and D) Hexanucleosomes; (23131) (C); (41414) (D). (E) A nucleosome is added to each terminal linker of the loop in (D) (asterisks). (F and G) Loops of six plus two nucleosomes as shown singly and in series of three. (F) A trimer, 1(13132)2, connected by β(2); (G) A trimer, 3(33123)5, connected by β(5). Values of β are approximate. α = 90°. Bar = 30 nm (C–G).