(see also "Several Insights into muscle contraction mechanism" part 1 and 2)     

     Some ingenious experiments performed in vitro by Spudich and his collaborators showed movement of myosin-coated beads on oriented filaments reconstituted from purified actin (James A. Spudich, Stephen J. Kron & Michael P. Sheetz - Movement of myosin-coated beads on oriented filaments reconstituted from purified actin - Nature 1985, 315, 584 - 586)

and, also, movement of single actin filaments on myosin filaments fixed to a surface (S J Kron , J A Spudich -  Fluorescent actin filaments move on myosin fixed to a glass surface - Proc Natl Acad Sci U S A. 1986, 17, 6272). clip