D T Woodrum, S A Rich, T D Pollard; Evidence for biased bidirectional polymerization of actin filaments using heavy meromyosin prepared by an improved method.. J Cell Biol 1 October 1975; 67 (1): 231–237. doi: https://doi.org/10.1083/jcb.67.1.231
Isolated actin filaments decorated with HMM can grow by addition of actin monomers to either end, although there is a bias toward addition at the end which is normally attached to the Z line in striated muscle.
