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Fluorescence lifetime imaging microscopy (FLIM) is a technique to map the spatial distribution of nanosecond excited state lifetimes within microscopic images. FLIM systems have been implemented both in the frequency domain, using sinusoidally intensity-modulated excitation light and modulated detectors, and in the time domain, using pulsed excitation sources and time-correlated or time-gated detection...
Fluorescence lifetime imaging microscopy (FLIM) is a quantitative microscopy technique for imaging nanosecond decay times of fluorophores. In the case of frequency-domain FLIM, several methods have been described to resolve the relative abundance of two fluorescent species with different fluorescence decay times. Thus far, single-frequency FLIM methods generally have been limited to quantifying two...
Although the distribution of DNA-binding proteins inside the cell nucleus can be analyzed by immunolabeling or by tagging proteins with GFP, we cannot establish whether the protein is bound to DNA or not. Here, we describe a novel approach that allows imaging of the in situ interaction between a GFP-fusion protein and DNA in the cell nucleus, using fluorescence resonance energy transfer (FRET). We...
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