A user-friendly two-color super-resolution localization microscope

Area of Science:

• Biophysics
• Microscopy
• Cell Biology

Background:

• Super-resolution microscopy techniques are crucial for visualizing cellular structures at the nanoscale.
• Developing robust and efficient multi-color imaging methods is essential for complex biological investigations.

Purpose of the Study:

• To develop and validate a robust two-color super-resolution localization microscopy method.
• To enable simultaneous imaging of two distinct targets with high spatial resolution and accuracy.

Main Methods:

• Utilized a two-dye combination of Alexa647 and Alexa750 in a specialized imaging buffer.
• Employed Tris(2-carboxyethyl)phosphine (TCEP) as a reliable switching regent for balanced dye performance.
• Implemented active sample locking for sub-nanometer sample stabilization during imaging.

Main Results:

• Achieved matched and balanced switching characteristics for both Alexa647 and Alexa750 dyes.
• Enabled simultaneous capture of both fluorescent signals on a single camera with high photon emission (>4,000 photons).
• Generated high-quality two-color super-resolution images across diverse biological samples, including cell cultures, tissue sections, and yeast cells.

Conclusions:

• The developed two-color super-resolution method offers a robust and versatile tool for advanced biological imaging.
• This technique facilitates detailed co-localization studies and structural analysis of complex biological systems.