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Updated: Nov 25, 2025

Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy
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Mapping Absolute DNA Density in Cell Nuclei using Single-molecule Localization Microscopy

Published on: November 11, 2025

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ゲノムスケールでのDNAメカニズム測定

Aakash Basu1,2, Dmitriy G Bobrovnikov1, Zan Qureshi3

  • 1Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

Nature
|December 17, 2020
PubMed
まとめ

科学者は DNAの曲げを測定するために ループセックを開発し 機械的なコードを明らかにしました このコードは遺伝子調節,核子の位置付け,クロマチンのリモデラー活性に影響を与え 細胞機能に影響を与えます

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Chromatin Packaging02:21

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Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter? 
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DNA in a human cell is almost 2m long and it is packed inside a tiny nucleus that is only a few microns in diameter. The level of compaction of DNA inside the nucleus is astonishing. It is organized into several sequentially higher levels of compaction to fit into such a tiny space. The most compact form of DNA is a chromosome that can be seen under a microscope in a dividing cell.
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