“…Some of the initial, processes in photosynthesis take place in photosystem I1 (PS II), one of the major pigment-protein complexes in the thylakoid membranes, which catalyzes the light-induced reduction of plastoquinone by water via a chain of redox reactions in higher plants, algae, and cyanobacteria (Barber, 1987;Andreasson and VanngArd, 1988;Vermaas, 1988). The PS II complex is composed of a number of proteins including D1, CP47, CP43, D2, apoproteins of cytochrome b559, and the extrinsic manganese-stabilizing protein, along with a number of small proteins (Arntzen and Pakrasi, 1986;Gray et al, 1989;Vermaas, 1989).…”