Quantitative FRAP in Analysis of Molecular Binding Dynamics In Vivo
2008
Fluorescence recovery after photobleaching (FRAP) reveals the dynamics of fluorescently tagged molecules within live cells. These molecular dynamics are governed by diffusion of the molecule and its in vivo binding interactions. As a result, quantitative estimates of the association and dissociation rates of binding can be extracted from the FRAP. This chapter describes a systematic procedure to acquire the FRAP data, and then fit it with appropriate mathematical models to estimate in vivo association and dissociation rates of binding. Also discussed are the applicability and limitations of the models, the utility of the estimated parameters, and the prospects for increased accuracy and confidence in the estimates.
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