Comment on

• Dual functions of Tet1 in transcriptional regulation in mouse embryonic stem cells.

  Wu H, D'Alessio AC, Ito S, Xia K, Wang Z, Cui K, Zhao K, Sun YE, Zhang Y. Wu H, et al. Nature. 2011 May 19;473(7347):389-93. doi: 10.1038/nature09934. Epub 2011 Mar 30. Nature. 2011. PMID: 21451524 Free PMC article.
• Dynamic regulation of 5-hydroxymethylcytosine in mouse ES cells and during differentiation.

  Ficz G, Branco MR, Seisenberger S, Santos F, Krueger F, Hore TA, Marques CJ, Andrews S, Reik W. Ficz G, et al. Nature. 2011 May 19;473(7347):398-402. doi: 10.1038/nature10008. Epub 2011 Apr 3. Nature. 2011. PMID: 21460836
• TET1 and hydroxymethylcytosine in transcription and DNA methylation fidelity.

  Williams K, Christensen J, Pedersen MT, Johansen JV, Cloos PA, Rappsilber J, Helin K. Williams K, et al. Nature. 2011 May 19;473(7347):343-8. doi: 10.1038/nature10066. Epub 2011 Apr 13. Nature. 2011. PMID: 21490601 Free PMC article.
• Genome-wide mapping of 5-hydroxymethylcytosine in embryonic stem cells.

  Pastor WA, Pape UJ, Huang Y, Henderson HR, Lister R, Ko M, McLoughlin EM, Brudno Y, Mahapatra S, Kapranov P, Tahiliani M, Daley GQ, Liu XS, Ecker JR, Milos PM, Agarwal S, Rao A. Pastor WA, et al. Nature. 2011 May 19;473(7347):394-7. doi: 10.1038/nature10102. Epub 2011 May 8. Nature. 2011. PMID: 21552279 Free PMC article.