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AbstractMany, though not all, non-heterocystous cyanobacteria can fix N2. However, very few strains can fix N2 aerobically. Nevertheless, these organisms may make a substantial contribution to the global nitrogen cycle. In this general review, N2 fixation by laboratory cultures and natural...
AbstractOral streptococci are sugar-fermentative bacteria comprising at least 19 distinct species and are a significant proportion of the normal microbial population of the mouth and upper respiratory tract of humans. These streptococci transport several sugars by the phosphoenolpyruvate:sugar...
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