Báo cáo khoa học: Metabolism and Energetics

Biological nitrogen fixation is a vital process in the global nitrogen cycle, transforming dinitrogen in the atmosphere into ammonia. Being a very energy-demanding and oxygen-sensitive process, both expression and activity of the nitrogenase enzyme are tightly regu-lated. Rhodospirillum rubrumis a free-living, photosynthetic, purple non-sulfur nitrogen-fixing bacterium, which has been extensively used as a model organism for metabolic and regulatory studies regarding nitrogen fixation.