5B7I:
reference: Structural basis of Cas3 inhibition by the bacteriophage protein AcrF3., Wang X, Yao D, Xu JG, Li AR, Xu J, Fu P, Zhou Y, Zhu Y, Nat Struct Mol Biol. 2016 Jul 25. doi: 10.1038/nsmb.3269. PMID: 27455460

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