5B3N:
reference: A Genetically Encoded Probe for Live-Cell Imaging of H4K20 Monomethylation., Sato Y, Kujirai T, Arai R, Asakawa H, Ohtsuki C, Horikoshi N, Yamagata K, Ueda J, Nagase T, Haraguchi T, Hiraoka Y, Kimura A, Kurumizaka H, Kimura H, J Mol Biol. 2016 Aug 14. pii: S0022-2836(16)30305-9. doi:, 10.1016/j.jmb.2016.08.010. PMID: 27534817

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