7BRE:
reference: Crystal Structure of MLL2 Complex Guides the Identification of a Methylation Site on P53 Catalyzed by KMT2 Family Methyltransferases., Li Y, Zhao L, Tian X, Peng C, Gong F, Chen Y, Structure. 2020 Oct 6;28(10):1141-1148.e4. doi: 10.1016/j.str.2020.07.002. Epub, 2020 Jul 21. PMID: 32697937

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