This story originally appeared in Biocommerce Week, a newsletter that has been discontinued.
Following the acquisition of two cell analysis businesses in the past month, PerkinElmer officials said last week that they are bullish on that market for 2007, though they expect both acquisitions to be neutral or slightly accretive to earnings this year. The firm also announced that its fourth-quarter 2006 revenues increased 10 percent year over year to $427 million.

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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.