Linescan microscopy data to extract diffusion coefficient of a fluorescent species using a commercial confocal...

Area of Science:

• Biophysics
• Cell Biology
• Microscopy

Background:

• Understanding molecular diffusion is crucial for cellular processes.
• Accurate measurement of diffusion coefficients aids in studying protein dynamics.

Purpose of the Study:

• To report on the measurement of diffusion coefficients of fluorescent species.
• To demonstrate a method for high-temporal-resolution diffusion analysis.

Main Methods:

• Utilized a commercial microscope with a resonant scanner.
• Employed sequential linescans at rates up to 12 kHz for high temporal resolution (83 μs).

Main Results:

• Diffusion coefficients measured over a range of 100 μm²/s down to 0.1 μm²/s.
• Presented data on dye molecule diffusion in varying viscosities and a membrane receptor.

Conclusions:

• The described setup is suitable for measuring rapid diffusion rates.
• The data provides insights into the diffusion properties of various cellular components.