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Molecular model of the 197‐bp NRL fibre in two different compaction states. Stacked nucleosomes where the opposing H2A–H2B dimers interact (see main text) are highlighted in the lower panel. At this interface respective linker histones (in cyan) form a twofold symmetry co‐axial of the interacting H2A–H2B dimers. The angle between dyad axes (in green) widens as the structure elongates. NRL, nucleosome repeat length.
