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Li T, Robert EI, van Breugel PC, Strubin M, Zheng N.Li T, et al. Among authors: zheng n.Nat Struct Mol Biol. 2010 Jan;17(1):105-11. doi: 10.1038/nsmb.1719. Epub 2009 Dec 6.Nat Struct Mol Biol. 2010.PMID: 19966799Free PMC article.