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Researchers probe secrets of bacterial immune system

(University of Otago) Scientists from New Zealand's University of Otago and the Netherlands are continuing to unlock the secrets of a surprisingly flexible bacterial immune system, called CRISPR-Cas. Just like humans, bacteria are constantly under attack by viruses that try to infect them by injecting viral DNA. This foreign DNA (together with other invading DNA, such as plasmids) has a major impact on the evolution of microorganisms.
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