the receptors for fibronectin ( fn-r ) and vitronectin ( vn-r ) belong to a family of integral membrane glycoproteins known to be involved in cell-extracellular matrix and cell-cell interactions named integrins ( fn-r = beta 1 integrin and vn-r = beta 3 integrin ) .
C0017968
glycoproteins
C0021701
integrins