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相关概念视频

DNA Packaging00:58

DNA Packaging

Overview
DNA Packaging00:58

DNA Packaging

Overview
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.
Genomic DNA in Eukaryotes00:58

Genomic DNA in Eukaryotes

Eukaryotes have large genomes compared to prokaryotes. To fit their genomes into a cell, eukaryotic DNA is packaged extraordinarily tightly inside the nucleus. To achieve this, DNA is tightly wound around proteins called histones, which are packaged into nucleosomes that are joined by linker DNA and coil into chromatin fibers. Additional fibrous proteins further compact the chromatin, which is recognizable as chromosomes during certain phases of cell division.
PCR01:32

PCR

Overview

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相关实验视频

Updated: Jul 3, 2026

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

编程DNA管周长的编程

Peng Yin1, Rizal F Hariadi, Sudheer Sahu

  • 1Department of Computer Science, California Institute of Technology, Pasadena, CA 91125, USA. py@caltech.edu

Science (New York, N.Y.)
|August 9, 2008
PubMed
概括
此摘要是机器生成的。

研究人员创建了基于DNA的分子管,具有精确,可调节的尺寸. 这种DNA纳米技术的突破使得可编程自组装的定制形状纳米结构能够用于先进的材料科学应用.

更多相关视频

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

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
10:23

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Published on: May 8, 2015

相关实验视频

Last Updated: Jul 3, 2026

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
08:00

DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers

Published on: October 25, 2017

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

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
10:23

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Published on: May 8, 2015

科学领域:

  • 纳米技术纳米技术
  • 材料科学 材料科学 材料科学
  • 超分子化学 超分子化学

背景情况:

  • 合成具有可控周长的分子管是纳米技术和材料科学中的一个关键挑战.
  • 在分子管尺寸中实现单分散性对于可预测的材料特性至关重要.

研究的目的:

  • 开发一种用于编程和合成具有用户定义的单分散圆周的分子管的方法.
  • 为了证明基于DNA的分子管的自我组装,具有一系列精确控制的大小.

主要方法:

  • 使用一个42个基单链DNA图案与模块化域.
  • 通过定义DNA域之间的特定互补关系来编程管周长.
  • 采用单步退火工艺进行自组装.

主要成果:

  • 通过自组装成功合成了长分子管.
  • 证明了对管子周长的精确控制,实现了4,5,6,7,8,10和20个DNA螺旋的单分散尺寸.
  • DNA 图案的设计直接决定了所得到的管子周长.

结论:

  • 已经建立了一种使用DNA图案编程分子管周长的新方法.
  • 单阶段回火提供了一条有效的途径,用于自组装单分散分子管.
  • 这项工作推进了可编程纳米结构的设计和合成,用于各种应用.