FRET Distances, R0.
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Patterson GH, Piston DW, Barisas BG. Förster Distances between Green Fluorescent Protein Pairs. Analytical Biochemistry 2000; 284:438–40.§
Discrepancies between published and calculated FRET distances are possibly due to the specific variability of the experimental environments, choice of published donor quantum yields and acceptor extinction coefficients, and source of fluorescent spectra intensities.