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相关概念视频

Nucleic Acid Structure01:25

Nucleic Acid Structure

The pentose sugar in DNA is deoxyribose, while in RNA the pentose sugar is ribose. The difference between the sugars is the presence of the hydroxyl group on the ribose's second carbon and a hydrogen on the deoxyribose's second carbon. The phosphate residue attaches to the hydroxyl group of the 5′ carbon of one sugar and the hydroxyl group of the 3′ carbon of the sugar of the next nucleotide, which forms  a 5′ to 3′ phosphodiester linkage.
DNA Structure
DNA has a double-helix structure. The...
Nucleic acids02:43

Nucleic acids

Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes, the...

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相关实验视频

Updated: May 8, 2026

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

温度激活的核酸纳米结构 温度激活的核酸纳米结构

Ke Zhang1, Xiao Zhu, Fei Jia

  • 1Department of Chemistry and Chemical Biology, Northeastern University , 360 Huntington Ave, Boston, Massachusetts 02115, United States.

Journal of the American Chemical Society
|September 13, 2013
PubMed
概括
此摘要是机器生成的。

研究人员开发了温度敏感的DNA-聚合物混合纳米粒子. 加热暴露了DNA用于杂交和生物的可访问性,而冷却则阻断了这些功能,使可控制的表面化学成为可能.

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Last Updated: May 8, 2026

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

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Published on: October 25, 2017

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Published on: April 12, 2019

科学领域:

  • 纳米技术 纳米技术
  • 材料科学 材料科学 材料科学
  • 生物化学 生物化学

背景情况:

  • 黄金纳米粒子 (AuNPs) 是各种应用的多功能平台.
  • 聚N-异烯胺 (PNIPAM) 具有温度依赖的可溶性.
  • DNA纳米技术为分子组装和功能提供了精确的控制.

研究的目的:

  • 在金纳米颗粒上联合组装DNA和PNIPAM.
  • 创建一个温度响应系统来控制DNA可访问性和表面化学.
  • 为了证明基于温度线索的表面功能的开关.

主要方法:

  • 在金纳米颗粒上联合组装DNA和PNIPAM.
  • 利用温度变化 (大约30°C) 来诱导PNIPAM的形状变化.
  • 使用互补链和温度变化监测DNA杂交和生物素可访问性.

主要成果:

  • 在金纳米颗粒上成功组装了DNA和PNIPAM.
  • 根据温度,可逆暴露和隐藏DNA序列.
  • 证明了表面化学的开关,DNA杂交和生物素可访问性在加热时被激活,在冷却时被阻止.

结论:

  • 开发的DNA-PNIPAM-金纳米粒子系统提供了一个新的温度触发平台.
  • 该系统允许精确控制表面化学和功能.
  • 建议在药物输送,传感和响应材料方面有潜在的应用.