This update serves to clarify that Invitrogen has divested the Heidelberg, Germany-based unit of its BioReliance business. The BioReliance business itself, which Invitrogen will retain, is based in Rockville, Md. The original story was based on a press release that did not describe the relationship between the Heidelberg and Rockville businesses.

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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.