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This Week in PNAS

Researchers from China and the US explore sepsis-related copy number changes involving the DEFA1/ DEFA3 genes, which code for human neutrophil peptide alpha-defensins. Following an earlier genetic association study that revealed copy number upticks in sepsis-prone patients from a Han Chinese population, the team turned to transgenic mouse models to compare sepsis susceptibility in mice with higher or lower DEFA1/ DEFA3 copy numbers in their neutrophil white blood cells.

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The former commissioner of the FDA has returned to the venture capital firm New Enterprise Associates as a special partner on the healthcare investment team.

Astronauts have edited yeast genes on the International Space Station in an experiment designed to show how cells repair themselves in space.

Emory University has found that two of its researchers failed to divulge they had received funds from China, according to the Atlanta Journal-Constitution.

In Science this week: influence of the nuclear genome on human mitochondrial DNA, and more.