This Week in PNAS

In a paper appearing in this week's PNAS Early Edition, a team led by investigators at the Salk Institute for Biological Studies in La Jolla, Calif., shows that, in response to salicylic acid exposure, transposon-associated differentially methylated regions in Arabidopsis thaliana that are accompanied by the upregulation of 21-nt siRNAs are often coupled to transcriptional changes of the transposon and/or the proximal gene.

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The UK's Human Fertility and Embryology Authority calls for consumer genetic testing companies to warn customers that testing could uncover family secrets, according to the Guardian.

The New York Times reports that United Nations delegates have been discussing how to govern the genetic resources of the deep sea.

Researchers have transplanted edited cells into mice that appear to combat cocaine addiction, New Scientist reports.

In PNAS this week: analysis of proteolytic enzymes secreted by circulating tumor cells, phylogenetic study of Fv1 evolution, and more.