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関連する概念動画

Chromatin Packaging01:32

Chromatin Packaging

Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
Chromatin Packaging02:21

Chromatin Packaging

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? 
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order structures.
The DNA Helix01:16

The DNA Helix

Overview
The DNA Helix01:07

The DNA Helix

Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
The Nucleosome01:19

The Nucleosome

Human DNA is almost two meters long. However, it is compressed inside a tiny nucleus measuring only a few microns in diameter. To make this degree of compaction possible, DNA is organized into several sequential levels so that it can 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.
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...
The Nucleosome02:33

The Nucleosome

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.
DNA is wound twice around a protein complex called histone core, that consist of 8 histone proteins. This complex...

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関連する実験動画

Updated: May 20, 2026

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules
09:32

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules

Published on: April 12, 2019

3次元のDNAナノ構造の枠組みの中で,電荷輸送が行われます.

Na Lu1, Hao Pei, Zhilei Ge

  • 1Laboratory of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.

Journal of the American Chemical Society
|July 20, 2012
PubMed
まとめ
この要約は機械生成です。

この研究は,3D DNAナノ構造におけるDNA媒介の電荷輸送 (CT) を研究しています. それは,異なる分子のための明確な経路を明らかにし,DNAベースの分子電子とバイオセンサ設計を進める.

さらに関連する動画

Analyzing and Building Nucleic Acid Structures with 3DNA
16:24

Analyzing and Building Nucleic Acid Structures with 3DNA

Published on: April 26, 2013

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
08:59

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

Published on: September 27, 2019

関連する実験動画

Last Updated: May 20, 2026

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules
09:32

Stable DNA Motifs, 1D and 2D Nanostructures Constructed from Small Circular DNA Molecules

Published on: April 12, 2019

Analyzing and Building Nucleic Acid Structures with 3DNA
16:24

Analyzing and Building Nucleic Acid Structures with 3DNA

Published on: April 26, 2013

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
08:59

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications

Published on: September 27, 2019

科学分野:

  • 分子生物学は分子生物学である.
  • ナノテクノロジー ナノテクノロジー
  • バイオフィジックス 生物物理学

背景:

  • 3次元 (3D) のDNAナノ構造は,分子センシングとセラピュティクスの可能性を秘めています.
  • これらの構造内のチャージトランスポート (CT) メカニズムを理解することは,先進的な電子機器の開発に不可欠です.

研究 の 目的:

  • 3D DNAナノ構造内のDNA媒介の電荷輸送 (CT) の運動学を調査する.
  • 特定のリドックスプローブを使用して,スルー・デュプレックスとスルー・スペースCTメカニズムを区別する.

主な方法:

  • テトラエドールDNAナノ構造のフレームワークを使用しました.
  • メチレンブルー (MB) とフェロセン (Fc) のリドックス分子の電荷輸送を研究した.
  • 金電極表面上の特定の位置に結合した分子に対するCT速度の測定.

主要な成果:

  • インターケラティブMBプローブのDNAデュプレックスに沿ったより長い距離での効率的なメディエイトCTが実証されました.
  • 非インターケラティブのFc探査機が,空間を通る電子トンネリングを経験することを示した.
  • 分子探査機の特徴に基づいてCT経路を区別する運動データを提供しました.

結論:

  • この研究は,3D DNA ナノ構造体内の異なる電荷輸送メカニズムを明らかにしています.
  • 発見は,DNAベースの分子電子学の理解に貢献します.
  • 高性能DNAバイオセンサデバイスの設計に関する洞察を提供します.