This Week in PLOS

Ticks alter what genes are expressed in their saliva as they feed on their hosts, researchers from the Czech Republic and the US report in PLOS Neglected Tropical Diseases. They performed RNA sequencing on single salivary glands from adult female Ixodes ricinus ticks. These ticks fed on either naturally on a rabbit or through artificial membrane feeding of rabbit blood lacking immune factors prior to the collection of their salivary glands.

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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.