This Week in Science

In Science this week, researchers from Gilead Sciences report on the crystal structure of NS5B, an RNA polymerase encoded by the hepatitis C virus that replicates the virus's RNA genome, and how the company's HCV therapy sofosbuvir interacts with the active site of the polymerase.

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Direct-to-consumer genetic testing companies have offered to test families separated at the southern US border, but that raises ethical issues.

CNBC reports that confirming a positive result from 23andMe's BRCA health report can be expensive.

The New York Times reports on a project to develop a tree DNA database to uncover illegal logging.

In PLOS this week: links between gut microbiome and colorectal cancer mutations, targeted sequencing uncovers genetic susceptibilities to epilepsy in Koreans, and more.