4NCB:
reference: Structure-based cleavage mechanism of Thermus thermophilus Argonaute DNA guide strand-mediated DNA target cleavage., Sheng G, Zhao H, Wang J, Rao Y, Tian W, Swarts DC, van der Oost J, Patel DJ, Wang Y, Proc Natl Acad Sci U S A. 2013 Dec 27. PMID: 24374628

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