psbE PSII reaction center subunit V MSGSTGERSFADIITSIRYWVIHSITIPSLFIAGWLFVSTGLAYDVFGSPRPNEYFTESRQGIPLITGRFDSLEQLDEFSKSF Cytochrome b559 subunit alpha PSBE_MESCR 83 This b-type cytochrome is tightly associated with the reaction center of photosystem II and possibly is part of the water-oxidation complex.