Since my colleague Brendan Maher returned from a chromatin meeting in January, it seems there's been a burst of activity in the epigenetics field, much of it covered here in __The Scientist__. On March 17, for instance, I linkurl:reported; on the publication of three papers in __Genes & Development__, which mapped the binding of the Dosage Compensation Complex (DCC) across the __Drosophila__ X chromosome during fly development. Today, __linkurl:Nature Genetics; __and __linkurl:PloS Biology; __ released papers that independently map Polycomb group (PcG) proteins across large swaths of the __Drosophila__ genome. Also today, our news site carries a linkurl:story; on three papers (in __Cell__ and __Nature__) that map chromatin proteins across the genome in mammalian stem cells, suggesting that PcG complexes may help maintain totipotency in embryonic stem cells. Why the sudden flurry in genome-wide epigenetics research? Probably it's due to the recent availability of high-density tiling microarrays from the likes...

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