In PNAS this week, researchers at the Centre National de la Recherche Scientifique have found that piRNAs play a role in post-transcriptional gene-silencing of transposable elements in Drosophila egg cells. They showed that the repression of the functional I elements located in euchromatin requires piRNA proteins, and the amount of ovarian I element piRNAs correlates with the strength of the repression.

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Jay Shendure and his colleagues have developed a new method to more comprehensively identify human cell types, the NY Times reports.

Researchers in the UK and Japan have shown that infertility in mice with three sex chromosomes can be overcome, according to the Guardian.

China is embracing preimplantation genetic diagnosis, Nature News reports. 

In PLOS this week: host genetic factors associated with cervical neoplasia progression, population patterns for an ancient flowering rainforest plant, and more.