NEW YORK, March 6 - Looking to validate its database and take another step toward drug discovery, AxCell Biosciences has signed a letter of intent with Thomas Jefferson University to study protein interactions linked to an undisclosed tumor-suppressor gene, the company said on Wednesday.

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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.