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相关概念视频

Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
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.
The DNA Helix01:16

The DNA Helix

Overview
DNA Packaging00:58

DNA Packaging

Overview
DNA Packaging00:58

DNA Packaging

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...

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相关实验视频

Updated: May 13, 2026

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

复杂的形状自组装自单链DNA.

Bryan Wei1, Mingjie Dai, Peng Yin

  • 1Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, USA.

Nature
|June 5, 2012
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的单链 (SST) 方法,用于可编程DNA自组装. 这种方法可以从许多不同的DNA中创建具有精确形状的复杂纳米结构.

更多相关视频

Design and Synthesis of a Reconfigurable DNA Accordion Rack
07:44

Design and Synthesis of a Reconfigurable DNA Accordion Rack

Published on: August 15, 2018

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

相关实验视频

Last Updated: May 13, 2026

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

Design and Synthesis of a Reconfigurable DNA Accordion Rack
07:44

Design and Synthesis of a Reconfigurable DNA Accordion Rack

Published on: August 15, 2018

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

科学领域:

  • 纳米技术 纳米技术
  • 合成生物学 合成生物学
  • 生物化学 生物化学

背景情况:

  • 核酸的自组编程,特别是DNA原形,有效地创建复杂的纳米结构.
  • 使用DNA或RNA组装成各种周期和算法结构的模块化策略.
  • 从众多独特地址中创建复杂的有限形状仍然是一个重大挑战.

研究的目的:

  • 开发一种使用DNA组装复杂有限纳米结构的更简单,更通用的方法.
  • 克服现有的模块化策略的局限性,从许多不同的中创建复杂的形状.

主要方法:

  • 引入了一种由42个基基DNA链组成的单链 (SST),其结合的粘性末端.
  • 使用自组装的矩形"分子帆布",每个SST作为一个"像素"与四个邻居结合.
  • 采用单回火工艺,使用特定的子子集来定义和组装目标形状.

主要成果:

  • 成功组装复杂的二维形状和管子,使用数百到一千多种不同的SSTs.
  • 通过使用SST的子集,从310像素的帆布上创建了107个独特的复杂的2D形状.
  • 验证了SST方法作为设计纳米结构的简单,模块化和强大的框架.

结论:

  • 单链 (SST) 组件为构建具有精确形状的复杂纳米结构提供了一种强大而易于使用的方法.
  • 该框架简化了从短合成DNA链中设计和制造复杂的纳米级物体.
  • 该SST方法显著推进可编程核酸自组装领域,用于各种应用.