Genotype for Quitting

Smokers with a certain polymorphism may have harder time quitting than others, Zhejiang University School of Medicine researchers say.

A number of previous — and controversial — studies have linked DRD2 gene variants to smoking behaviors, and one reported a higher prevalence of the Taq1A A1 allele among current and former smokers than among nonsmokers.

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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.