A spectral decomposition of the fluorescence emission from labelled receptors within cells, together with a simple but accurate data analysis of their mutual Förster resonant energy transfer, can provide high-resolution real-time imaging of the fate of intracellular proteins.
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Chirico, G. Protein watching. Nature Photon 3, 81–82 (2009). https://doi.org/10.1038/nphoton.2008.281
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DOI: https://doi.org/10.1038/nphoton.2008.281