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October 2008

2i-iPS cell colony. Inhibitors of the Mek/Erk and GSK3 pathways (2i) in the absence of serum promote the generation of induced pluripotent stem (iPS) cell colonies, shown here. These cells show expression of a pluripotency reporter (green) and reactivation of the silent X chromosome, as demonstrated by the lack of the nuclear red staining body (trimethyl H3K27). For comparison, a cluster of non-reprogrammed cells (non-green) displaying a silent X chromosome (red nuclear body) is shown in the bottom right-hand corner (see Silva et al., e253).

Image Credit: Illustration by Jose Silva and Ornella Barrandon

Editorial

PLoS Biology at 5: The Future Is Open Access

Theodora Bloom, Christine Ferguson, Liza Gross, Catriona J MacCallum, Jami Milton, Robert Shields, Stephanie Wai, Janelle Weaver, Liz Williams

Feature

Arctic Sentinels

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Perspective

Is Bayh-Dole Good for Developing Countries? Lessons from the US Experience

Anthony D So, Bhaven N Sampat, Arti K Rai, Robert Cook-Deegan, Jerome H Reichman, Robert Weissman, Amy Kapczynski

Research Articles

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