直接微秒宽场单分子跟踪和超分辨率映射通过CCD垂直转移垂直转移.
1Department of Chemistry, University of California, Berkeley, Berkeley, California, USA.
Nature communications
|November 25, 2025
概括
SpeedyTrack通过使用EM-CCD摄像头将时间投射到空间,实现微秒宽场单分子跟踪. 这种方法实现了快速扩散分子的高时间分辨率和活细胞中的超分辨率映射.
科学领域:
- 生物物理学的生物物理.
- 光学成像技术的成像
- 纳米技术纳米技术
背景情况:
- 广场单分子跟踪对于理解分子动力学至关重要.
- 目前的方法受到相机时间的限制,这阻碍了对快速分子运动的观察.
研究的目的:
- 开发一种用于微秒宽场单分子跟踪和成像的新技术.
- 为了克服传统的基于摄像头的跟踪的时间分辨率限制.
主要方法:
- SpeedyTrack利用EM-CCD的垂直电荷转移能力在空间上分离图像.
- 这有效地将时间域投射到CCD芯片的空间域.
- 此外,VS-SpeedyTrack还将空间和时间信息用于超分辨率映射.
主要成果:
- 实现了分子扩散到1000μm2/s的宽场追踪,时间分辨率为50μs.
- 证明了用于分子状态阐明的同时进行的福斯特共振能量转移测量.
- 通过纳米级分辨率解决了光蛋白在活细胞中的扩散模式.
结论:
- SpeedyTrack为微秒单分子跟踪提供了一个简单的解决方案,没有硬件修改.
- 允许在广场中对分子轨迹进行超分辨率映射.
- 开辟了研究生物系统中的快速分子动态的新途径.
相关概念视频
Super-resolution Fluorescence Microscopy
12.1K
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...
12.1K
Confocal Fluorescence Microscopy
19.9K
Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
19.9K


