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Quantum yield ratio (QA/QD) and absorption ratio (KA/KD) in all excitation wavelengths used between acceptor and donor are indispensable to quantitative fluorescence resonance energy transfer (FRET) measurement based on linearly unmixing excitation–emission spectra (ExEm‐spFRET). We here describe an approach to simultaneously measure QA/QD and KA/KD values by linearly unmixing the excitation–emission...
Quantification of fluorescence resonance energy transfer (FRET) needs at least two external samples, an acceptor‐only reference and a linked FRET reference, to calibrate fluorescence signal. Furthermore, all measurements for references and FRET samples must be performed under the same instrumental conditions. Based on a novel notion to predetermine the molar extinction coefficient ratio (RC) of acceptor‐to‐donor...
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