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Jonathan Rothberg has raised some $100 million to develop a small, portable ultrasound device, Technology Review reports. The device is being developed by Butterfly Network, a company coming out of Rothberg's 4Combinator incubator.

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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.