This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, researchers from China, Spain, and Switzerland explore the history of a Mycobacterium tuberculosis genotype known as the Beijing family. The team considered genome sequences for more than 350 global M. tuberculosis isolates — including dozens of Beijing and non-Beijing strains that were newly sequenced for the study — as well as genotyping patterns for around 1,400 more.

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The apple has traveled westward and eastward along the Silk Road, according to a new genetic analysis.

In Nature this week: GWAS data used to reposition drugs for psychiatric use, and more.

Genetic disease risk information doesn't always spur people to make healthy lifestyle changes, according to the Associated Press.

A University of California, San Diego-led team has used liquid biopsies to uncover possible treatments for patients with cancers of unknown primary.