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In work out of Dave Bartel's MIT lab, researchers found that even though RNAi has not been conserved in the model budding yeast, Saccharomyces cerevisiae, it is present in other species, including S. castellii and Candida albicans. These two species use "noncanonical" Dicer proteins to make small interfering RNAs that mostly correspond to transposable elements and Y' subtelomeric repeats, they say, and when they introduced Dicer and Argonaute of S. castellii into S.

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The FDA and CDC call for a pause in administering Johnson & Johnson's SARS-CoV-2 vaccine while reports of rare blood clots are looked into, reports the Wall Street Journal.

According to the Associated Press, a Swiss program aims to shepherd long-term science projects and diplomacy.

CNN reports that two new studies suggest the B.1.1.7 SARS-CoV-2 variant may be more transmissible, but may not lead to more severe disease.

In PNAS this week: analysis of pathway affecting acute kidney injury, parental-specific allelic expression in horse placenta, and more.