Motors are classified as rotatory or translatory. Eukaryotic translatory proteins translocate materials along filaments (actin filaments, microtubules) and play a role in muscular contraction, cell division, and cellular material transport.
● ATP synthase is the final enzyme of oxidative phosporylation, and the F1Fo ATP synthase is the commonest chemi-mechanical motor found in nature.
● topoisomerase operates to unwind DNA molecules – it severs one strand of the double helix, allowing it to relax, and then repairs the cleaved location.
● myosin, which moves along actin microfilaments,
● kinesin and dynein, which move along microtubules (tubulin filaments).
Џ Video explaining operation of the F1-F0 ATPase (Harvard U) Џ
 ATP synthase  kinesin 
. DNA packing in bacteriophage ø29 (phi-29) . Dynein . Kinesin . Myosin . molecular motors .