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Model of Rad54B converting the Dmc1–DNA complex from the octameric ring form to the helical filament form. Rad54B interacts with terminus of the stacked octameric rings of the Dmc1–DNA complex, causing a conversion into the helical-filament form. This conversion results in the stabilization of the Dmc1–ssDNA complex, and the stimulation of the DNA strand exchange promoted by Dmc1.
