This Week in PNAS

In the early, online edition of the Proceedings of the National Academy of Sciences, an international research team catalogs the microRNAs present in more than a dozen human cell types. The researchers did short RNA sequencing on more than 1,300 samples representing 13 tissue types. Using this data, they tallied up more than 3,700 miRNAs not described previously, classifying new and known miRNAs based on their tissue-specificity.

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In Science this week: International Wheat Genome Sequencing Consortium publishes the bread wheat cultivar Chinese Spring reference genome, and more.

At his FDA Law Blog, Jeffrey Gibbs discusses FDA's technical assistance for the draft Diagnostic Accuracy and Innovation Act.

The New York Times reports that genetic testing has uncovered unfaithful penguins at a Utah aquarium.

Cancer researcher loses funding under new Wellcome Trust anti-bullying policies, the Guardian reports.