- β1 integrin
- any integrin containing a β1 chain; members of this group are variously expressed on leukocytes, platelets, and some non-blood cells and mediate cell-matrix adhesion. Heterodimers of this class were first identified on T cells 2 to 4 weeks after activation in vitro and were called very late activation (VLA) antigens; the designation VLA has been continued for other proteins of this group, with numbers designating individual members.
Medical dictionary. 2011.