This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, an international research team catalogs the microRNAs present in more than a dozen human cell types. The researchers did short RNA sequencing on more than 1,300 samples representing 13 tissue types. Using this data, they tallied up more than 3,700 miRNAs not described previously, classifying new and known miRNAs based on their tissue-specificity.

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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.