Four of six talks in the Cytoskeleton Dynamics Minisymposium described work on filament end-binding proteins: a reflection of the central role they play in cytoskeletal organization. Scott Hansen's single-molecule study of purified vasodilator-stimulated phosphoprotein (VASP) demonstrated that it is a weakly processive actin polymerase that is targeted to filament ends by actin monomers. Hansen...