Figure 4
From: 'Single molecule': theory and experiments, an introduction
Motility assays experiments with molecular motors. (A) Myosin is shown with two globular heads, which can hydrolyze ATP; it binds actin filament (black filament); (B) In a motility assay experiment, myosin molecules are grafted on a surface; in the presence of ATP, actin filaments bind to the surface (C); They move directionally as shown by the superposition of succeeding images (D) or snapshots of the same filament over time (see (E), time between snapshots 5 s); the white arrow (C-D-E) shows the same filament.