2ZKF:
reference: Recognition of hemi-methylated DNA by the SRA protein UHRF1 by a base-flipping mechanism., Arita K, Ariyoshi M, Tochio H, Nakamura Y, Shirakawa M, Nature. 2008 Oct 9;455(7214):818-21. Epub 2008 Sep 3. PMID: 18772891

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