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Fluorescence excitation spectra (for emission at 678 nm) of LHCaR1 reconstituted with P. cruentum pigments (thick solid line), or with spinach pigments of Chl a/b 2.8 (thin solid line) and Chl a/b 0.7 (- - - - -). Conditions were as in Fig. 3. Chl b (469 nm), carotenoids (505 nm), and Chl a (440 nm) regions are resolved in the fourth derivative spectrum (– – – –) of the Chl a/b 2.8 sample.
