4NJ5:
reference: SRA- and SET-domain-containing proteins link RNA polymerase V occupancy to DNA methylation., Johnson LM, Du J, Hale CJ, Bischof S, Feng S, Chodavarapu RK, Zhong X, Marson G, Pellegrini M, Segal DJ, Patel DJ, Jacobsen SE, Nature. 2014 Mar 6;507(7490):124-8. doi: 10.1038/nature12931. Epub 2014 Jan 22. PMID: 24463519

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