FIGURE 6.

PSI activities of PSI complexes. A, P700 photo-oxidation activity was monitored via light-induced absorption changes at 699 nm of the PSI-LHCI from A-3 (a) and the PSI subcomplex from A-2 (b) upon illumination in the presence of plastocyanin and ascorbate as electron donors and methyl viologen as an electron acceptor. B, NADP⁺ photoreduction activity was monitored via light-induced absorption changes at 340 nm of the PSI-LHCI (a) and the PSI subcomplex (b) in the presence of dichloroindophenol and ascorbate as electron donors.