This Week in PNAS

In a paper in the Proceedings of the National Academy of Sciences this week, scientists at CNRS in Paris have used network analysis to study the structure and evolution of genetic diversity. Studying about 119,000 homologous DNA families taken from 111 cellular genomes and 165,529 phage, plasmid, and environmental virome sequences, they found that plasmids, not viruses, were "key vectors of genetic exchange between bacterial chromosomes, both recently and in the past," they say.

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The Jackson Laboratory has filed a complaint accusing Nanjing University of breeding and re-selling its mouse models, the Hartford Courant reports.

Oxford researchers are turning to virtual reality to visualize genes and regulatory elements, Phys.org says.

In Science this week: neutrophils rely on microRNA to protect against lung inflammation, and more.

China is moving forward with plans to sequence a million citizens, the Wall Street Journal reports.