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相关概念视频

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

4.6K
Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...
4.6K
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

3.1K
Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
3.1K

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相关实验视频

Updated: Apr 10, 2026

Single Particle Cryo-Electron Microscopy: From Sample to Structure
11:52

Single Particle Cryo-Electron Microscopy: From Sample to Structure

Published on: May 29, 2021

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在晶体学分辨率下单粒子冷电磁波.

Yifan Cheng1

  • 1Department of Biochemistry and Biophysics, University of California San Francisco, 600 16th Street, San Francisco, CA 94158, USA.

Cell
|April 25, 2015
PubMed
概括

单粒子电子冷显微镜 (cryo-EM) 现在实现了原子分辨率,与X射线晶体学竞争. 这一突破使我们能够对具有挑战性的生物分子进行结构分析,进步我们对复杂生物功能的理解.

科学领域:

  • 结构生物学 结构生物学
  • 生物化学 生物化学
  • 显微镜技术 显微镜技术

背景情况:

  • 从历史上看,单粒子电子冷显微镜 (cryo-EM) 提供了有限的分辨率 (纳米到亚纳米).
  • 这种分辨率范围往往使得它在详细的结构研究中不如X射线晶体学.
  • 对于传统的结构分析来说,某些宏分子很难或不可能结晶.

研究的目的:

  • 审查冷EM硬件和软件的最新进展.
  • 突出将冷EM转化为高分辨率结构生物学技术的变化.
  • 讨论冷EM用于确定以前难以处理的生物分子的原子结构的应用.

主要方法:

  • 对冷电子显微镜仪器仪表的最新突破进行了审查.
  • 对软件开发的分析,以增强冷EM中的图像处理和数据分析.
  • 将冷电磁波分辨率与已知技术 (如X射线晶体学) 的比较.

主要成果:

  • 现在,冷电磁波可以达到与X射线结晶学相提并论的分辨率.
  • 复杂的宏分子的原子结构可以使用冷EM来确定.
  • 这种技术对于抗结晶或在特定功能状态下研究的分子是有效的.

更多相关视频

Manual Blot-and-Plunge Freezing of Biological Specimens for Single-Particle Cryogenic Electron Microscopy
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Manual Blot-and-Plunge Freezing of Biological Specimens for Single-Particle Cryogenic Electron Microscopy

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A Robust Single-Particle Cryo-Electron Microscopy cryo-EM Processing Workflow with cryoSPARC, RELION, and Scipion
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A Robust Single-Particle Cryo-Electron Microscopy cryo-EM Processing Workflow with cryoSPARC, RELION, and Scipion

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相关实验视频

Last Updated: Apr 10, 2026

Single Particle Cryo-Electron Microscopy: From Sample to Structure
11:52

Single Particle Cryo-Electron Microscopy: From Sample to Structure

Published on: May 29, 2021

10.0K
Manual Blot-and-Plunge Freezing of Biological Specimens for Single-Particle Cryogenic Electron Microscopy
09:16

Manual Blot-and-Plunge Freezing of Biological Specimens for Single-Particle Cryogenic Electron Microscopy

Published on: February 7, 2022

7.6K
A Robust Single-Particle Cryo-Electron Microscopy cryo-EM Processing Workflow with cryoSPARC, RELION, and Scipion
13:43

A Robust Single-Particle Cryo-Electron Microscopy cryo-EM Processing Workflow with cryoSPARC, RELION, and Scipion

Published on: January 31, 2022

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结论:

  • 最近的硬件和软件创新已经彻底改变了冷EM.
  • 现在,冷电磁波是一种强大的工具,用于在原子层面确定生物分子的结构.
  • 这使我们能够更深入地了解复杂的生物分子及其功能.