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Role of RNA polymerase IV in plant small RNA metabolism.
Zhang X, Henderson IR, Lu C, Green PJ, Jacobsen SE. Zhang X, et al. Proc Natl Acad Sci U S A. 2007 Mar 13;104(11):4536-41. doi: 10.1073/pnas.0611456104. Epub 2007 Mar 5. Proc Natl Acad Sci U S A. 2007. PMID: 17360559 Free PMC article.