Analysis of protein and lipid dynamics using confocal fluorescence recovery after photobleaching (FRAP).

Day CA, Kraft LJ, Kang M, Kenworthy AK
Curr Protoc Cytom. 2012 Chapter 2: Unit2.19

PMID: 23042527 · PMCID: PMC3538152 · DOI:10.1002/0471142956.cy0219s62

Fluorescence recovery after photobleaching (FRAP) is a powerful, versatile, and widely accessible tool to monitor molecular dynamics in living cells that can be performed using modern confocal microscopes. Although the basic principles of FRAP are simple, quantitative FRAP analysis requires careful experimental design, data collection, and analysis. In this unit, we discuss the theoretical basis for confocal FRAP, followed by step-by-step protocols for FRAP data acquisition using a laser-scanning confocal microscope for (1) measuring the diffusion of a membrane protein, (2) measuring the diffusion of a soluble protein, and (3) analysis of intracellular trafficking. Finally, data analysis procedures are discussed, and an equation for determining the diffusion coefficient of a molecular species undergoing pure diffusion is presented.

© 2012 by John Wiley & Sons, Inc.

MeSH Terms (16)

Animals Cell Biology Cell Membrane Cercopithecus aethiops COS Cells Diffusion DNA, Complementary Fluorescence Recovery After Photobleaching Image Processing, Computer-Assisted Kinetics Lipids Microscopy, Confocal Models, Statistical Plasmids Proteins Software

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