1N3J:
reference: A dimeric viral SET domain methyltransferase specific to Lys27 of histone H3., Manzur KL, Farooq A, Zeng L, Plotnikova O, Koch AW, Sachchidanand, Zhou MM, Nat Struct Biol 2003 Mar;10(3):187-96. PMID: 12567185

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