Abstract
Microbial clustered regularly interspaced short palindromic repeats— better known as “CRISPR”—systems act in some ways like mammalian immune systems. In the case of CRISPRs, however, they enable bacteria and archaea to fend off phages and other forms of invasive DNA. That defense now also extends to invasive RNA molecules, report researchers at the University of Georgia (UGA). Moreover, CRISPR systems in any particular host have a nifty way of distinguishing self from foreign genetic material, thus accounting for how each system spares its own genome while taking apart invading genomes, reports another research team from Northwestern University.
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