This Week in PLOS

Researchers from Howard University and JCVI examined the fecal microbiome of half a dozen African-American patients with and without colonic polyps. As they report in PLOS One this week, they used a combination of a 16S rRNA phylogenetic array, the HITChip, and 16s rRNA sequencing to find that the patient and healthy samples differed in the levels of Bacteroides.

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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.