Please cite as: CSH Protocols; 2006; doi:10.1101/pdb.ip17
| Information Panel |
This information panel was adapted from "Imaging Protein Interactions by FRET Microscopy," Chapter 32, in Protein-Protein Interactions (eds. Golemis and Adams). Cold Spring Harbor Laboratory Press, Cold Spring Harbor, NY, USA, 2005.
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RELATED INFORMATION
For more information about the photophysical principles of FRET and the derivations of the equations below, see Measuring FRET by Sensitized Emission.
FLIM Measurements
FRET reduces the fluorescence lifetime of the donor fluorophore (
, a measure of the excited-state duration), since it depopulates its excited state, an effect that is also manifest as a reduction in the donor quantum yield (the ratio of the number of fluorescence photons emitted compared to the number of photons absorbed). FRET can be detected purely via donor fluorescence because
is an intrinsic fluorescence parameter; that is, it is independent of probe concentration and light
Frequency Domain FLIM Data Analysis
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