This Week in Science

In an early online publication, James Thomson has derived human iPS cells using non-integrating episomal vectors. After removing the episome, his team was able to derive iPS cells that were free of vector and transgene sequences and that were similar to human embryonic stem cells.

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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.