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Figure 1. A model of a homologous pairing intermediate complex between Dmc1, ssDNA, and dsDNA.
The search and the pairing of two homologous sequences take place at the center of the Dmc1 double ring. The dsDNA is shown entering from one end of the stacked ring, and the paired product is shown coming out from the other end of the stacked ring. The ssDNA is shown passing through the cavity created by the stacking of two Dmc1 rings.