PerkinElmer is targeting acquisitions and additional alliances in 2006 as it places greater emphasis on its health sciences operations and looks to expand its growth platforms, company officials recently said in a conference call.

Specifically, company officials said the firm will expand its drug-discovery tool portfolio "to include next-generation proteomics diagnostics," including reagents for biomarker discovery.

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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.