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Mechanism of Ciliary Motion01:05

Mechanism of Ciliary Motion

The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...

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Updated: Jun 4, 2026

Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers
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Multiplexed Single-molecule Force Proteolysis Measurements Using Magnetic Tweezers

Published on: July 25, 2012

通过单分子拉动,机械激活的分子开关通过单分子拉动.

Ignacio Franco1, Christopher B George, Gemma C Solomon

  • 1Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States. ifranco@chem.northwestern.edu

Journal of the American Chemical Society
|February 3, 2011
PubMed
概括
此摘要是机器生成的。

我们用力谱学和分子电子学模拟了一个单分子开关. 机械操纵导致电导率变化超过三次数,揭示了关键的电荷传输机制.

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科学领域:

  • 分子电子学分子电子学
  • 单分子光谱学 单分子光谱学
  • 计算化学是一种计算化学.

背景情况:

  • 单分子开关对于分子电子学至关重要.
  • 在动态分子系统中理解电荷传输是具有挑战性的.
  • 强光谱在单个分子水平上提供机械控制.

研究的目的:

  • 用联合力光谱和分子电子学研究单分子开关.
  • 模拟分子在折叠和展开状态之间的机械操纵.
  • 在展开/重新折叠过程中分析导电性变化和充电运输机制.

主要方法:

  • 分子动力学模拟.分子动力学模拟.
  • 模拟一个导电原子力显微镜 (c-AFM).
  • 在机械操纵过程中监测导电性和力.

主要成果:

  • 观察到超过3个数量级的可逆导电性变化.
  • 导电性的显著波动凸显了统计抽样的必要性.
  • 预测可观测的单分子特征,如导电性和力闪.

结论:

  • 这项研究表明,在动态双稳定性中出现的单分子特征.
  • 绘制了管理负载运输的结构-功能关系.
  • 模拟提供了对复杂单分子实验现象学的见解.