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Super-resolution Fluorescence Microscopy

Super-resolution Fluorescence Microscopy

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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Updated: Jun 21, 2025

Improving High Viscosity Extrusion of Microcrystals for Time-resolved Serial Femtosecond Crystallography at X-ray Lasers

Improving High Viscosity Extrusion of Microcrystals for Time-resolved Serial Femtosecond Crystallography at X-ray Lasers

Published on: February 28, 2019

微秒时间分辨率的X射线散射利用第二代XFEL的MHz重复率.

Patrick E Konold¹, Leonardo Monrroy², Alfredo Bellisario¹

¹Laboratory of Molecular Biophysics, Department of Cell and Molecular Biology, Uppsala University, Uppsala, Sweden.

|July 5, 2024

概括

研究人员开发了一种使用X射线激光观察微小蛋白质结构变化的新方法. 这种技术为生物分子动力学提供了清晰的视图,这对生物学和医学至关重要.

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An Experimental Protocol for Femtosecond NIR/UV - XUV Pump-Probe Experiments with Free-Electron Lasers

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科学领域:

生物物理学的生物物理.
结构生物学结构生物学
生物化学生物化学

背景情况:

了解生物分子的快速结构变化对于许多科学领域至关重要.
现有的方法往往缺乏捕捉短暂分子动态的速度或灵敏度.

研究的目的:

引入一种新的时间解析X射线散射技术,用于检测微秒生物分子中的结构扰动.
为了证明这种方法在观察蛋白质展开动态中的应用.

主要方法:

使用X射线自由电子激光器 (XFEL) 的MHz重复率.
获取超低噪音水平 (0.001%) 的蛋白质散射时间序列数据.
应用该技术研究光-氧-电压光传感域的Jɑ螺旋展开.

主要成果:

成功生成了微秒时间序列的蛋白质散射数据.
实现了非常低的噪音水平,使得结构变化能够灵敏地检测到.
提供了对Jɑ螺旋体展开过程的直接观察.

结论:

开发的MHz XFEL时间解析散射方法对于观察微秒生物分子动态是有效的.
这种策略很容易实施,并且广泛适用于研究各种生化过程.
提供了一种强大的新工具,用于直接观察生物系统中的结构动态.