This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Science, Indiana University biologist Michael Lynch and his colleagues peek at the base substitution mutation rate in Paramecium tetraurelia, a freshwater ciliate. From genome sequence data from seven so-called "mutation accumulation" lines, which had been started with individual cells and grown for thousands of generations, the team saw pronounced genome stability in P. tetraurelia.

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

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

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.