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. 2009 Dec 30;38(6):2044–2056. doi: 10.1093/nar/gkp1187

Figure 4.

Figure 4.

TnpI-mediated recombination at the reversed core site IRS2.1 variant in vitro. Supercoiled plasmids carrying directly repeated copies of wild-type IRS (IRS1.2 × 1.2) or modified IRS in which the orientation of the IR1–IR2 core site is reversed with respect to the DR1–DR2 accessory sequence (IR2.1 × 2.1) were incubated for the indicated times with purified TnpI. Reaction were digested with AvaII (AII) and analysed by electrophoresis on a 0.8% agarose gel. S1, S2 and S3 are the AvaII fragments from the initial substrates. D1 and D2 are specific fragments from the deletion products. AvaII digestion of the reactions also produced χ-forms corresponding to the Holliday junction (HJ) intermediate of recombination.