This Week in Science

In Science this week, researchers at the University of Arizona report that a lateral transfer of fungal genes underlies the red pea aphid's ability to produce carotenoids. Nancy Moran and Tyler Jarvik found that the aphid genome "encodes multiple enzymes for carotenoid biosynthesis" by performing phylogenetic analyses, they were able to show that red aphids have a 30-kb region encoding a single carotenoid desaturase derived from fungal genes, which green aphids do not have.

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Senator Elizabeth Warren (D-Mass.) has released the results of a genetic ancestry analysis, the Boston Globe reports.

Retraction Watch's Ivan Oransky and Adam Marcus report that Harvard Medical School and Brigham and Women's Hospital have recommended that more than 30 papers from a former researcher be retracted.

Thomas Steitz, who won the 2009 chemistry Nobel Prize for his ribosome work, has died, the Washington Post reports.

In PLOS this week: mechanisms for genes implicated in coronary artery disease, rumen microbes and host genetics influence cow methane production, and more.