Movie 4

Actin and myosin II dynamics during cell spreading on fibronectin.
Representative time-lapse series showing cells spreading on fibronectin-coated substrate, imaged by structured illumination microscopy (SIM). Cells were labeled with tdTomato-F-tractin (actin) and GFP myosin II regulatory light chain (MRLC). The time interval is 9.5 seconds. Scale bar: 10 μm. Timestamp: mm:ss, The display rate: 15 frames per second.