de Albuquerque BF et al. (2013) Dev Cell "Is this mine? small RNAs help to decide."

Ketting RF, de Albuquerque BF

[Dev Cell, 2013]

Genomes are constantly challenged by invaders, so determining what belongs is crucial. Small RNAs silence alien DNA, but Conine etal. (2013), Seth etal. (2013), and Wedeles etal. (2013) now report in Cell and Developmental Cell that these tiny transcripts can also license trusted DNA for expression.