Actin filament gliding on M. soleus (left) and ventricular (right) myosin preparations on a BSA-coated chamber surface. The average actin filament velocity on M. soleus myosin was 0.292 and 0.829 µm/s on ventricular myosin (T = 23°C, 2 mM MgATP, played at speed of acquisition).
