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相关概念视频

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

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Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
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Super-resolution Fluorescence Microscopy01:37

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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相关实验视频

Updated: Jun 17, 2025

Single-Molecule Tracking Microscopy - A Tool for Determining the Diffusive States of Cytosolic Molecules
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单分子定位显微镜和跟踪用光机械敏感探头.

Jimmy Maillard1,2, Ewa Grassin1, Ekaterina Bestsennaia1,2

  • 1Department of Physical Chemistry, University of Geneva, 1211 Geneva, Switzerland.

The journal of physical chemistry. B
|August 9, 2024
PubMed
概括

飞TR探头能够对细胞膜进行单分子超分辨率成像,分辨有序和无序的脂质区域. 这一进步允许通过分子扩散跟踪对膜组成进行详细分析.

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科学领域:

  • 生物物理学的生物物理.
  • 细胞生物学 细胞生物学
  • 光学成像技术的成像

背景情况:

  • 管光探针通过光寿命报告细胞机械力.
  • 设计用于超分辨率显微镜的Flipper-CF3探测器,在混乱的膜中检测单个分子时太暗了.

研究的目的:

  • 为了评估单分子超分辨率成像的Flipper-TR探针.
  • 评估Flipper-TR在分离不同类型的脂质膜的能力.
  • 通过扩散分析来研究Flipper-TR在通过扩散分析来区分膜组成方面的潜力.

主要方法:

  • 单分子超分辨率光显微镜.
  • 在脂质双层中跟踪单个Flipper-TR探针分子.
  • 分析探针扩散系数以推断膜组成.

主要成果:

  • 飞TR兼容单分子超分辨率成像.
  • Flipper-TR 在巨大的单状囊泡中解决了液体有序和液体无序的膜.
  • 探头扩散系数区分不同脂质组成的膜.
  • 飞TR和飞CF3之间的亮度差异源于它们的光学特性.

结论:

  • Flipper-TR是一种可行的工具,用于单分子超分辨率成像膜张力.
  • 飞-TR脚手架可以适应各种超分辨率应用,包括目标衍生品.