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Gene-Suppressing Proteins Reveal Secrets of Stem Cells

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Science  21 Apr 2006:
Vol. 312, Issue 5772, pp. 349
DOI: 10.1126/science.312.5772.349a

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According to papers in Cell and Nature this week, molecules called polycomb group proteins are key guardians of "stemness," the ability of embryonic stem cells to replicate indefinitely and retain the potential to turn into any kind of body cell. (Read more.)