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Figure 4
Time-resolved hybrid spectroscopy XFMS. The decrease in the fluorescence emission of SpyTag003-sfGFP during the formation of the SpyCatcher003-AF588–SpyTag003-sfGFP complex is due to FRET (left). Kinetic trace of fluorescence emission at 515 nm is best fitted to a double exponential decay (solid line) that determines a fast and slow rate of FRET response during the binding event (right). |