This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, Stanford University's Stephen Quake and colleagues describe a single-molecule imaging method they developed to assess two epigenetic modifications — 5-methylcytosine and 5-hydroxymethylcytosine — simultaneously and in relation to one another.

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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.