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This Week in Science

In Science Signaling this week, researchers in Germany report on their loss-of-function RNAi screen which revealed Ras- and Raf-independent MEK-ERK signaling in human epithelial cells during Chlamydia trachmatis infection. Their study also identified 59 host factors that either positively or negatively influenceChlamydia replication; depletion of Ras or Raf in HeLa cells increased the pathogen's growth.

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Australia will not be regulating gene editing of plants, animals, and human cell lines as long as no new genetic material is incorporated, reports Nature News.

The Washington Post reports that the US Department of Agriculture told its researchers to label peer-reviewed articles as "preliminary" work.

Researchers have sequenced the genomes of both the coast redwood and the giant sequoia, according to the San Francisco Chronicle.

In PNAS this week: study of epigenetic patterns in mammalian eggs, clonal expansion patterns in CD8+ T cells, and more.