- The IIb-IIIa glycoprotein complex that mediates platelet aggregation is directly implicated in leukocyte adhesion. Burns, G.F., Cosgrove, L., Triglia, T., Beall, J.A., López, A.F., Werkmeister, J.A., Begley, C.G., Haddad, A.P., d'Apice, A.J., Vadas, M.A. Cell (1986)