This Week in PNAS

In the early, online version of the Proceedings of the National Academy of Sciences, researchers from China and the US describe DNA methylation profiles that appear to show promise for distinguishing tumor tissue from neighboring normal tissue, along with potential markers for diagnosing cancer and predicting metastases.

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The Seattle Times writes that pharmacogenomics testing can help choose medications that may work best for people with depression.

Researchers report that deleting one gene from butterflies affects their wing coloration patterns, according to the Washington Post.

In PNAS this week: genome sequencing of weevil symbionts, retinoid X receptor deletion in lung cancer metastasis, and more.

Sequencing could help combat foodborne illnesses, according to a blog post by Food and Drug Administration officials.