Genomes are constantly challenged by invaders, so determining what belongs is crucial. Small RNAs silence alien DNA, but Conine et al. (2013), Seth et al. (2013), and Wedeles et al. (2013) now report in Cell and Developmental Cell that these tiny transcripts can also license trusted DNA for expression.
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| http://dx.doi.org/10.1016/j.devcel.2013.12.005 | DOI Listing |
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