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Super-resolution Fluorescence Microscopy

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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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Sample Preparation for Single Virion Atomic Force Microscopy and Super-resolution Fluorescence Imaging

Sample Preparation for Single Virion Atomic Force Microscopy and Super-resolution Fluorescence Imaging

Published on: January 2, 2014

Sample preparation for single virion atomic force microscopy and super-resolution fluorescence imaging.

Jeffery A Hodges¹, Saveez Saffarian

¹Department of Physics & Astronomy, University of Utah.

Journal of Visualized Experiments : Jove

|January 17, 2014

Summary

We developed a specific method for immobilizing single virions to glass surfaces, crucial for advanced imaging techniques like atomic force microscopy and super-resolution fluorescence microscopy.

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Area of Science:

Biophysics
Microscopy
Surface Science

Background:

Immobilizing single virions to surfaces is essential for high-resolution imaging.
Existing methods lack specificity, leading to non-specific binding and experimental noise.

Purpose of the Study:

To develop a specific and controlled method for single virion immobilization on glass surfaces.
To enable reliable single virion imaging using techniques like AFM and super-resolution fluorescence microscopy.

Main Methods:

Grafting glass surfaces with poly-L-lysine-graft-polyethylene glycol (PLL-g-PEG) and biotinylated PLL-g-PEG.
Introducing an avidin layer to the modified surface.
Attaching biotinylated, virus-specific antibodies to create specific virion anchors.

Main Results:

Achieved specific adhesion of single virions to prepared glass surfaces.
Demonstrated the technique's compatibility with atomic force microscopy (AFM).
Validated the method for super-resolution fluorescence imaging applications.

Conclusions:

The developed sample preparation method provides controlled virion adhesion.
This technique enhances the reliability and specificity of single virion imaging experiments.
Facilitates advanced biophysical studies at the single-virion level.