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PsbU is a subunit of the extrinsic complex attached to the core of photosystem II. A PsbU-mutant of Synechococcus PCC 7942 was isolated based on its elevated resistance to externally applied oxidative stress. PsbU-mutant exhibits fast rates of degradation of the photosystem II core protein, D1, under sub-saturating as well as high-light conditions. While forward electron transfer is not affected,...
Cyanobacteria possess an inducible mechanism which enables them to concentrate inorganic carbon (Ci) within the cells. An inactivation library was used to raise the high-CO 2 -requiring mutant of Synechococcus PCC 7942, IL-2, impaired in HCO -3 transport. Analysis of the relevant genomic DNA detected several modifications, probably due to the single crossover recombination, leading...
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