This Week in PLOS

In PLOS Genetics, researchers from Israel explore ties between mitochondrial variation and gene expression using RNA sequence data for hundreds of lymphoblast cell lines developed from 1000 Genomes Project samples. From sequences in 454 of the cell lines, the team uncovered distinct mitochondrial gene expression in samples from individuals in mitochondrial haplogroup L, the most commonly described African haplogroup.

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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.