2MWP:
reference: Structural Plasticity of Methyllysine Recognition by the Tandem Tudor Domain of 53BP1., Tong Q, Cui G, Botuyan MV, Rothbart SB, Hayashi R, Musselman CA, Singh N, Appella E, Strahl BD, Mer G, Kutateladze TG, Structure. 2015 Jan 8. pii: S0969-2126(14)00406-7. doi:, 10.1016/j.str.2014.11.013. PMID: 25579814

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