UNIT 2.19 Analysis of Protein and Lipid Dynamics Using Confocal Fluorescence Recovery After Photobleaching (FRAP)
Published Online: 1 OCT 2012
Copyright © 2012 by John Wiley & Sons, Inc.
Lab Protocol Title
Current Protocols in Cytometry
How to Cite
Day, C. A., Kraft, L. J., Kang, M. and Kenworthy, A. K. 2012. Analysis of Protein and Lipid Dynamics Using Confocal Fluorescence Recovery After Photobleaching (FRAP). Current Protocols in Cytometry. 62:2.19:2.19.1–2.19.29.
- Published Online: 1 OCT 2012
- Published Print: OCT 2012
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. Curr. Protoc. Cytom. 62:2.19.1-2.19.29. © 2012 by John Wiley & Sons, Inc.
- confocal laser-scanning microscopes;
- protein trafficking;
- fluorescence microscopy;