This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, a team from the US and Japan characterizes the relationship between two coral reef-associated organisms: the tropical, filter-feeding tunicate Lissoclinum patella and its alpha-proteobacterium symbiont, Candidatus Endolissoclinum faulkneri. Using metagenomic sequence data from tunicate samples sequenced using Roche 454, Illumina, or Sanger approaches, the researchers cobbled together a genome sequence for the bacterial symbiont. Though Ca. E.

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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.