This Week in PNAS

In a study appearing online this week in the Proceedings of the National Academy of Sciences, researchers from the University of Texas at Austin and the University of California, San Francisco, describe a role for viral microRNAs in inhibiting signaling by interferon, an antiviral cytokine in the human immune system. The team transfected human cell lines with a library of more than 70 miRNAs from viruses known to infect humans.

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Two researchers have found that behavioral genetic defenses in criminal cases don't tend to affect outcomes, according to Popular Science.

Researchers report that while host genetics influence the oral microbiome, they don't appear to affect cavity-causing microbes, the Economist says.

Pandas' gut microbiomes change as what they eat changes with the seasons, writes Discover's Inkfish blog.

In PLOS this week: comparative genomic study of malaria-linked macaque parasite, search for apple root reference genes, and more.