2EI9:
reference: Characterization of the sequence specificity of the R1Bm endonuclease domain by structural and biochemical studies., Maita N, Aoyagi H, Osanai M, Shirakawa M, Fujiwara H, Nucleic Acids Res. 2007;35(12):3918-27. Epub 2007 May 30. PMID: 17537809

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