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(A) Fluorescence decay kinetics of carotenoid-containing LH2 from Rb. sphaeroides 2.4.1 and the corresponding LH2/TiO2 (2.0 g/L) colloidal solution probed at 852 nm, fitted by a monoexponential decay with a time constant of 1.0 and 0.76 ns, respectively; (B) corresponding time-resolved fluorescence spectra of LH2 and LH2/TiO2.
