Immunocytochemical colocalization of myosin and Ser19-phosphorylated myosin light chain with fibrin on SM-rich rafts. (A) Localization of SM-rich rafts (green) and myosin (red). Scale bar, 5 μm. (B) Localization of fibrin (green) and myosin (red). (C) Localization of Ser19-phosphorylated MLC (green) and myosin (red). (D) Integrin β3 (green) and fibrin (red).