1J23:
reference: X-ray and biochemical anatomy of an archaeal XPF/Rad1/Mus81 family nuclease: similarity between its endonuclease domain and restriction enzymes., Nishino T, Komori K, Ishino Y, Morikawa K, Structure (Camb) 2003 Apr;11(4):445-57. PMID: 12679022

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