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首页> 外文期刊>Crystallography reports >Structural hierarchy of chromatin in chicken erythrocyte nuclei based on small-angle neutron scattering: Fractal nature of the large-scale chromatin organization
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Structural hierarchy of chromatin in chicken erythrocyte nuclei based on small-angle neutron scattering: Fractal nature of the large-scale chromatin organization

机译：基于小角度中子散射的鸡红细胞核中染色质的结构层次：大规模染色质组织的分形性质

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摘要

The chromatin organization in chicken erythrocyte nuclei was studied by small-angle neutron scattering in the scattering-vector range from 1.5 x 10(-1) to 10(-4) angstrom(-1) with the use of the contrast-variation technique. This scattering-vector range corresponds to linear dimensions from 4 nm to 6 mu m and covers the whole hierarchy of chromatin structures, from the nucleosomal structure to the entire nucleus. The results of the present study allowed the following conclusions to be drawn: (1) both the chromatin-protein structure and the structure of the nucleic acid component in chicken erythrocyte nuclei have mass-fractal properties, (2) the structure of the protein component of chromatin exhibits a fractal behavior on scales extending over two orders of magnitude, from the nucleosomal size to the size of an entire nucleus, and (3) the structure of the nucleic acid component of chromatin in chicken erythrocyte nuclei is likewise of a fractal nature and has two levels of organization or two phases with the crossover point at about 300-400 nm.
机译：利用对比度变化技术，通过在1.5 x 10（-1）到10（-4）埃（-1）的散射矢量范围内的小角中子散射，研究了鸡红细胞核中的染色质组织。该散射矢量范围对应于从4 nm到6μm的线性尺寸，并覆盖了从核小体结构到整个核的染色质结构的整个层次。本研究结果可得出以下结论：（1）鸡红细胞核中的染色质蛋白结构和核酸成分的结构均具有质量分数特性，（2）蛋白质成分的结构从核小体大小到整个核的大小，染色质的分形表现出超过两个数量级的分形行为;（3）鸡红细胞核中染色质的核酸成分的结构同样具有分形性质并且具有两个组织层次或两个阶段，交叉点在大约300-400 nm之间。

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