%0 Journal Article %T Subunit treadmilling of microtubules or actin in the presence of cellular barriers: possible conversion of chemical free energy into mechanical work. %A Hill, T L %A Kirschner, M W %J Proceedings of the National Academy of Sciences %@ 0027-8424 %D 1982-01-01 %I Proceedings of the National Academy of Sciences %~ DeepDyve