Some proteins like ATP synthase kind of act like gears as well: http://www.mrc-mbu.cam.ac.uk/sites/default/files/images/image/atpsynanim.gif http://www.mrc-mbu.

Some proteins like ATP synthase kind of act like gears as well: http://www.mrc-mbu.cam.ac.uk/sites/default/files/images/image/atpsynanim.gif http://www.mrc-mbu.cam.ac.uk/sites/default/files/images/imag...