Fibronectin is an extracellular matrix glycoprotein. It exists as a dimer consisting of two nearly identical ~250-kDa subunits. Fibronectin plays a major role in the adhesion of various types of cells, including fibroblasts, hepatocytes, and neurons. In addition to cell adhesion, this glycoprotein mediates many other cellular processes (such as cell migration and phagocytosis) through the interaction with a family of specialized cell-surface receptors called integrins. It is also well established that fibronectin has profound effects on wound healing.