what is integrin
Integrin. Definition. noun, plural: integrins. A large group of cell adhesion molecule comprised of two subunits (ï¡- and ï¢- subunits) that are both essential in promoting cell adhesion (i.e. cell binding to another cell or to an extracellular matrix component).ntegrin. Definition. noun, plural: integrins. A large group of cell adhesion molecule comprised of two subunits (ï¡- and ï¢- subunits) that are both essential in promoting cell adhesion (i.e. cell binding to another cell or to an extracellular matrix component).