Bacterial CRISPR-Cas systems acquire short sequences, called spacers, from viruses and plasmids, leading to adaptive immunity. The diversity of spacers within natural bacterial populations is very high. New data now explain how spacer diversity strengthens resistance of the bacterial population to phage infection.
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| http://dx.doi.org/10.1016/j.cub.2016.05.034 | DOI Listing |
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