Local Geometry and Elasticity in Compact Chromatin Structure

Selection of Suitable Geometry in Compact Heat Exchanger Design

Elasticity, Geometry and Buckling

strain, leading to the formation of a periodic array of elongated, almost closed ellipses, as shown in Fig. 2D for 3 1⁄4 "0.21. Since the specimens are made of an elastomeric material, the process is fully reversible and repeatable. Upon release of the applied vertical displacement, the deformed structures recover their original congurations. Interestingly, Figs. 2C–D clearly shows that the po...

Compact structure of ribosomal chromatin in Xenopus laevis.

Micrococcal nuclease digestion was used as a tool to study the organization of the ribosomal chromatin in liver, blood and embryo cells of X. laevis. It was found that in liver and blood cells, ribosomal DNA is efficiently protected from nuclease attack in comparison to bulk chromatin. Although ribosomal chromatin is fragmented in a typical nucleosomal pattern, a considerable portion of ribosom...

Selection of Suitable Geometry in Compact Heat Exchanger Design

A metastable structure for the compact 30‐nm chromatin fibre

The structure of compact 30-nm chromatin fibres is still debated. We present here a novel unified model that reconciles all experimental observations into a single framework. We propose that compact fibres are formed by the interdigitation of the two nucleosome stacks in a 2-start crossed-linker structure to form a single stack. This process requires that the dyad orientation of successive nucl...