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. 2014 Jun 26;42(12):7489–7527. doi: 10.1093/nar/gku447

Figure 7.

Figure 7.

A general mechanism for DNA cleavage by EcoRI and EcoRV. An activated water molecule attacks the phosphorous in-line with the phosphodiester bond to be cleaved by an SN2 reaction, which proceeds with inversion of configuration. X, Y and Z are a general base, a Lewis acid and a general acid, respectively.