4In 2007, Barrangou et al. demonstrated for the first time the function of CRISPR/Cas9 as a defensive mechanism of bacteria against bacteriophage attacks by a technique called “plaquing” which builds upon the technique of “plating” bacteria on agar. Plaques of viruses on agar are areas without growth of bacteria due to viral attacks.
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John Lewis shop staff, including those working in Waitrose, will receive a pay rise on 1 April, bringing their hourly rate to £13.25, or £14.80 in London.。关于这个话题，safew官方下载提供了深入分析
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