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相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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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
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相关实验视频

Updated: May 31, 2025

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging
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使用CTFMeasure估计冷电子断层扫描对比转移函数和绝对倾斜角偏移的协议.

Ranhao Zhang1, Yuan Shen2, Xueming Li3

  • 1Key Laboratory for Protein Sciences of Ministry of Education, School of Life Sciences, Tsinghua University, Beijing 100084, China; State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Joint Center for Life Sciences, Beijing 100084, China; Beijing Frontier Research Center for Biological Structure, Beijing 100084, China; School of Life Sciences, Tsinghua University, Beijing 100084, China; Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China.

STAR protocols
|January 23, 2025
PubMed
概括

本研究介绍了CTFMeasure,这是一个用于估计对比转移函数 (CTF) 参数和冷电子断层扫描 (cryoET) 数据中绝对倾斜角偏移的协议. 准确的CTF估计对于高分辨率的冷ET图像处理至关重要.

关键词:
细胞生物学 细胞生物学化电磁波是一种冷电磁波.显微镜的使用方法

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科学领域:

  • 结构生物学 结构生物学
  • 显微镜技术 显微镜技术
  • 计算生物学 计算生物学

背景情况:

  • 准确的对比转移函数 (CTF) 估计对于处理冷电子断层扫描 (cryoET) 数据至关重要.
  • 现有的方法可能无法完全解决化ET倾斜系列中CTF估计的复杂性.

研究的目的:

  • 通过使用CTFMeasure软件在冷ET中进行CTF估计的详细协议.
  • 为了使CTF参数和绝对倾斜角偏移的同时估计.

主要方法:

  • 使用CTFMeasure对CTF参数和绝对倾斜角偏移估计.
  • 输入文件配置和参数估计的详细步骤.
  • 功率频谱可视化和输出分析的程序.

主要成果:

  • CTFMeasure成功估计了冷ET倾斜系列的CTF参数.
  • 该协议允许确定绝对倾斜角度偏移的确定.
  • 提供可视化和分析方法来验证结果.

结论:

  • 提出的CTFMeasure协议提供了一个可靠的CTF估计方法在cryoET.
  • 精确的CTF和倾斜角度偏移的确定增强了冷ET数据处理.
  • 该协议有助于提高冷ET研究的分辨率和数据质量.