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Rolling model for motor-induced pushing of SSB. The translocating motor (triangle) collides with the SSB (blue circle) (in this case from the 5′ side) and strips a portion of the ssDNA from the SSB creating an unoccupied ssDNA binding site. The newly available ssDNA binding site is then bound by ssDNA from the 3′ side, replacing the ssDNA displaced by the translocase. This results in a net directional movement of the SSB toward the 3′ end of the ssDNA by a rolling mechanism.
