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相关概念视频

The DNA Helix01:07

The DNA Helix

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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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DNA as a Genetic Template02:05

DNA as a Genetic Template

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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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DNA Packaging00:58

DNA Packaging

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Overview
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相关实验视频

Updated: Oct 2, 2025

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

Published on: May 8, 2015

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编程2D超分子组件使用线框DNA原形

Xiao Wang1, Hyungmin Jun1, Mark Bathe1

  • 1Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Journal of the American Chemical Society
|March 1, 2022
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种使用线框DNA原木构建块的等级自组策略,以创建更大的纳米级结构和周期数组,克服个别DNA原木对象的尺寸限制.

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Designing a Bio-responsive Robot from DNA Origami
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相关实验视频

Last Updated: Oct 2, 2025

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Design and Synthesis of a Reconfigurable DNA Accordion Rack
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Design and Synthesis of a Reconfigurable DNA Accordion Rack

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科学领域:

  • 纳米技术和材料科学
  • 合成生物学和DNA纳米技术

背景情况:

  • 线框DNA原形能够编程纳米尺度的几何形状,六螺旋捆 (6HB) 设计提供了多功能性和形状忠实性.
  • 个体DNA原始物体的大小受到支架DNA长度的限制,限制了可编程纳米结构的规模.

研究的目的:

  • 引入一个层次的自我组装策略,以克服DNA原形的尺寸限制.
  • 为了实现超分子组件和周期性二维数组的编程, 使用线框DNA原形作为构建块.

主要方法:

  • 在超分子组合中利用并行半交叉和横向凝聚相互作用.
  • 采用上下序列设计策略 (METIS) 进行二维线框DNA原形.
  • 使用三角形和六角形的原形构建块制造的二元体,六角形超结构和周期性二维数组.

主要成果:

  • 从线框DNA原形单元成功展示了较大的结构和周期性阵列的等级自组.
  • 通过原子力显微镜 (AFM) 和传输电子显微镜 (TEM) 的可视化证实了超结构的结构完整性.
  • 实现密集的和非密集的周期性2D阵列,对设计的形状具有高保真性.

结论:

  • 层次设计方法为制造更大和更复杂的二维纳米级材料提供了一个一般的平台.
  • 这种策略克服了个体DNA原始体的内在尺寸限制.
  • 开发的方法适用于各种线框原形设计,并为材料科学中的各种应用开辟了道路.