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Use of channel chirality to distinguish revolution motors from rotation motors. (A) In revolution motors, the right-handed DNA revolves within a left-handed channel. (B) In rotation motors, the right-handed DNA rotates through a right-handed channel via the parallel thread, with DnaB shown as an example (130). (Adapted from reference 50.) PDB codes: phi29 gp10, 1H5W; DnaB, 4ESV.
