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Microtubule sliding and ATPase activity of Eg5 homodimers. (A) SDS–polyacrylamide gel electrophoresis of double-headed (left) and single-headed (right) Eg5. (B) Eg5-driven MT sliding velocities. Squares, single-headed Eg5; circles, double-headed Eg5. (C) MT-activated ATPase activities. Activities are expressed in terms of per second per head. MT, microtubule.
