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Thaumarchaeota are an abundant and widespread group of prokaryotes. They perform an important geochemical process: the oxidation of ammonia to nitrite using molecular oxygen as an electron acceptor, the first step in the two-step process of nitrification. But they have proven difficult to isolate into pure culture and most of our knowledge of their ecophysiology stems from experiments with environmental samples or from work with the original isolate. The author of this journal paper reviews current investigations to isolate this organism into a pure culture. [Source: Environmental Microbiology Reports]
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