3UA3:
reference: Structural insights into protein arginine symmetric dimethylation by PRMT5., Sun L, Wang M, Lv Z, Yang N, Liu Y, Bao S, Gong W, Xu RM, Proc Natl Acad Sci U S A. 2011 Dec 20;108(51):20538-43. Epub 2011 Dec 5. PMID: 22143770

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