This Week in Nature

In the current issue of Nature, scientists led by the University of Pennsylvania's Shelley Berger used chIP to study how Sir2 in yeast, which is known to deacetylate histone H4 lysine 16 and play a role in aging, affects cellular longevity. She found that in old yeast cells, a decrease in Sir2 was met by an increase in H4 lysine 16 acetylation and loss of histones at specific subtelomeric regions, resulting in "compromised transcriptional silencing at these loci."

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The New York Times reports that the US Department of Defense has implemented about half the recommendations made to improve safe handling of dangerous agents.

An Australian-led team has generated a draft genome assembly of the invasive cane toad in hopes it will help in population control, the Sydney Morning Herald reports.

In PLOS this week: approach for teasing out archaic introgression in human genomes, immune transcription features in HCV infection, and more.

Stat News reports that Maryland is promoting itself to the biotech industry with a mobile billboard.