Related Experiment Video
Updated: Nov 24, 2025
07:00
Measuring Diffusion Coefficients via Two-photon Fluorescence Recovery After Photobleaching
Published on: February 26, 2010
11.5K
Defining the Diffusion in Model Membranes Using Line Fluorescence Recovery after Photobleaching
Jakob L Kure1, Camilla B Andersen1, Thomas E Rasmussen2
1SDU Biotechnology, Department of Green Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
Membranes
|December 22, 2020
Summary
Line FRAP effectively detects lipid diffusion in synthetic membranes. Diffusion rates correlate with temperature and membrane morphology, highlighting line FRAP
Area of Science:
- Biophysics
- Membrane science
- Materials science
Background:
- Studying lipid dynamics in synthetic membranes is crucial for understanding biological processes.
- Membrane lipid diffusion is complex and influenced by composition and physical state.
- Advanced techniques are needed to accurately measure lipid mobility.
Purpose of the Study:
- To evaluate the utility of line FRAP for assessing lipid diffusion in synthetic lipid membranes.
- To investigate the relationship between diffusion coefficients, temperature, and membrane morphology.
- To determine if line FRAP is a suitable method for studying plasma membrane dynamics.
Main Methods:
- Utilized line FRAP (Fluorescence Recovery After Photobleaching) technique.
- Investigated two synthetic lipid membrane compositions: 1:1 DOPC:DPPC and 2:2:1 DOPC:DPPC:Cholesterol.
- Measured diffusion coefficients across varying temperatures.
Main Results:
- Established a correlation between the diffusion coefficient and temperature.
- Demonstrated that this correlation is dependent on the specific membrane morphology.
- Successfully applied line FRAP to analyze diffusion in the chosen synthetic membrane models.
Conclusions:
- Line FRAP is a viable and accessible technique for studying lipid diffusion in synthetic membranes.
- Membrane morphology significantly influences the temperature dependence of lipid diffusion.
- The findings support the potential of line FRAP for future research on plasma membrane dynamics.
Related Concept Videos
01:24Protein Diffusion in the Membrane
5.2K
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
5.2K
01:19Protein Dynamics in Living Cells
2.5K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.5K