Transcription of Cyanobacteria
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Cyanobacteria W F Vincent, Laval University, Quebec City, QC, Canada 2009 Elsevier Inc. All rights reserved. Introduction Spanish) because of their algal-like appearance, their possession of chlorophyll rather than bacteriochloro- Cyanobacteria are photosynthetic prokaryotes that phyll, and their photosynthetic production of oxygen capture sunlight for energy using chlorophyll a and by a two-photosystem process as in algae and higher various accessory pigments. They are common in plants. The most widely used taxonomic schemes for lakes, ponds, springs, wetlands, streams, and rivers, these organisms are largely based on the Interna- and they play a major role in the nitrogen, carbon, and tional Botanical Code, with separation according to oxygen dynamics of many aquatic environments.
Cyanobacteria also have various enzymatic defences against reactive oxygen species, such as superoxide dismutase. Finally, cyanobacteria have a variety of
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