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The aim of this work was to develop an improved method for isolation and purification of genomic DNA from filamentous cyanobacteria. The method described here employs a modified phenol extraction-based procedure. It allowed us to obtain a high yield (60-620 μg/g wet weight, depending on the cyanobacterial strain) of pure and undegraded genomic DNA (A260/A280 ratio of about 1.8 and A260/A230 ratio...
The expression of genes involved in the luminescence (lux genes) of many light-emitting bacteria, including the marine bacterium Vibrio harveyi, is regulated by a phenomenon called quorum sensing. The expression of the lux genes, and thus the efficiency of light emission, depends on the concentration of cells in the environment. Bacterial luminescence is effective when cells occur at high density,...
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